Question: How many moles of H+ ions are present in the following aqueous solutions?(a) 1.40 L of 0.25 M perchloric acid(b) 6.8 mL of 0.92 M nitric acid(c) 2.6 L of 0.085 M hydrochloric acid

Answers

Answer 1

The number of moles of H+ ions present in the following aqueous solutions is as follows:-

(a) 1.40 L of 0.25 M perchloric acid= 0.35 mol H+ ions

(b) 6.8 mL of 0.92 M nitric acid= 0.00626 mol H+ ions

(c) 2.6 L of 0.085 M hydrochloric acid= 0.221 mol H+ ions

Molarity is used to determine the number of moles of a solute present in 1 liter of a solution.

(a) The molarity of perchloric acid is given as 0.25 M. Thus, we can find the number of moles of H+ ions present in the given solution using the below formula:-

Moles of solute = Molarity x Volume in litres= 0.25 x 1.40= 0.35 mol H+ ions

(b) The volume of the given nitric acid is 6.8 mL, i.e. 0.0068 L. Thus, the number of moles of H+ ions present in this solution can be calculated using the below formula:-

Moles of solute = Molarity x Volume in liters= 0.92 x 0.0068= 0.00626 mol H+ ions

(c) The volume of the given hydrochloric acid is 2.6 L. Thus, we can find the number of moles of H+ ions present in the given solution using the below formula:-

Moles of solute = Molarity x Volume in liters= 0.085 x 2.6= 0.221 mol H+ ions

Learn more about moles https://brainly.com/question/15356425

#SPJ11


Related Questions

What is the type of mixture whose components are evenly distributed throughout?

Answers

The type of mixture whose components are evenly distributed throughout is a homogeneous mixture.

A homogeneous mixture is a mixture in which the components are uniformly distributed throughout. The mixture appears to be the same throughout, and it has the same physical and chemical properties throughout. The composition of the components of a homogeneous mixture is uniform. An example of a homogeneous mixture is a solution of sugar and water. Sugar dissolves in water to form a homogeneous mixture. Another example is salt and water. Salt dissolves in water to form a homogeneous mixture.

However, These are the kinds of combinations where the ingredients are evenly dispersed throughout. In other words, "they are consistent throughout. In a homogenous mixture, we can only see one phase of the substance and components are evenly distributed throughout .

To know more about Homogenous mixture please visit:

https://brainly.com/question/20956879

#SPJ11

Cattails in swamps are used to absorb chemical pollutants. what method of reducing pollutant concentration is this​

Answers

Phytoremediation is a cost-effective and environmentally friendly method of reducing pollutant concentrations and restoring contaminated ecosystems.

What is Pollutants?

Pollutants are substances or agents that contaminate the environment and have harmful effects on living organisms, natural resources, or the climate. Pollutants can be released into the air, water, or soil from natural sources or human activities such as industrial processes, transportation, agriculture, and waste disposal. Some common examples of pollutants include greenhouse gases, particulate matter, ozone, nitrogen oxides, sulfur dioxide, lead, mercury, pesticides, and plastic waste.

The method of using cattails in swamps to absorb chemical pollutants is called phytoremediation. Phytoremediation is a type of bioremediation that uses plants to remove, detoxify, or sequester contaminants from soil, water, or air. In this process, plants absorb contaminants through their roots or take them up from the air and store them in their tissues or metabolize them into less harmful forms. Cattails are particularly effective at removing organic pollutants such as pesticides, herbicides, and petroleum products, as well as heavy metals like lead, cadmium, and arsenic.

Learn more about  Pollutants from given link

https://brainly.com/question/24704410

#SPJ1

what is the formula for chlorine

Answers

The formula for chlorine is Cl2.

The descriptions below explain two ways that water is used by plants on a sunny day.

I. In a process called transpiration, some liquid water in leaves changes to water vapor. The water vapor is released into the air through tiny pores in the leaves. This allows more liquid water from the soil to be pulled up the roots and stem to replace water lost from the leaves.

II. Plants use some of this water in leaves in a process called photosynthesis. During photosynthesis, water and carbon dioxide break apart and recombine to form two new substances, oxygen and glucose.

Based on the above description of transpiration and photosynthesis, which type of change happens to water during each process?

In transpiration, because some of its properties change, water undergoes a physical change but keeps its identity. In photosynthesis, because its identity changes, water undergoes a chemical change.
In transpiration, because some of its properties change, water undergoes a chemical change but keeps its identity. In photosynthesis, because its identity changes, water undergoes a physical change.
In transpiration, because its physical properties change, water undergoes a physical change and loses its identity. In photosynthesis, because it keeps its identity, water undergoes a chemical change.
In transpiration, because its chemical properties change, water undergoes a chemical change and loses its identity. In photosynthesis, because it keeps its identity, water undergoes a physical change.

Answers

The correct answer is: In transpiration, because some of its properties change, water undergoes a physical change but keeps its identity.

What are transpiration and photosynthesis?

Transpiration and photosynthesis are both processes that involve the use of water by plants.

Transpiration is the process by which water evaporates from the leaves of a plant and is released into the atmosphere. This occurs through tiny openings on the surface of leaves called stomata. The water that is lost through transpiration is replaced by water absorbed by the roots of the plant from the soil.

Photosynthesis, on the other hand, is the process by which plants use water, along with carbon dioxide and sunlight, to produce oxygen and glucose. During photosynthesis, water is split into hydrogen and oxygen, and the oxygen is released into the atmosphere as a byproduct. The glucose that is produced is used as a source of energy by the plant.

In transpiration, because some of its properties change, water undergoes a physical change but keeps its identity. In photosynthesis, because its identity changes, water undergoes a chemical change.

To know more about photosynthesis, visit:

https://brainly.com/question/29764662

#SPJ1

Answer:

Its A

Explanation:

Got it right on the quiz

chromium metal has a binding energy of 7.21 x 10-19 j for certain electrons. what is the photon frequency needed to eject electrons with 2.2 x 10-19 j of energy?

Answers

To eject electrons with 2.2 x 10^-19 J of energy is 1.42 x 10^15 Hz.

what is the photon frequency needed? Chromium metal has a binding energy of 7.21 x 10^-19 J for certain electrons. So, the energy needed to eject the electrons is: Energy needed = Binding energy + Ejected electrons' energy = 7.21 x 10^-19 J + 2.2 x 10^-19 J = 9.41 x 10^-19 JNow, we know the energy needed to eject electrons is 9.41 x 10^-19 J. And we know that the energy of a photon is given by E = hν, where h is Planck's constant and ν is the frequency of the photon. To find the photon frequency needed, we can use the equation:

E = hνν = E/hν = (9.41 x 10^-19 J) / (6.63 x 10^-34 J·s)ν = 1.42 x 10^15 Hz

Hence, the photon frequency needed to eject electrons with 2.2 x 10^-19 J of energy is 1.42 x 10^15 Hz.

Learn more about photon frequency  at brainly.com/question/30107923

#SPJ4

Complete the statements about the different types of lipids. ______ are the building blocks for many lipids and generally contain an even number of carbon atoms and an unbranched hydrocarbon chain.______ are lipid compounds that contain a fused ring system. These compounds contain three six-membered rings and one five-membered ring, and some of these compounds are found in biological membranes. ______ are formed when a carbohydrate is glycosidically linked to a hydroxyl group of a lipid. These compounds are also found in biological membranes and include gangliosides and cerebrosides. ______ are the storage form of lipids that accumulate in adipose tissue and can be used as metabolic fuel. These compounds have a polar head, made of three ester groups, and a nonpolar fatty acid tail. ______ are made up of a long-chain amino alcohol joined to a fatty acid by either a glycosidic or phosphodiester linkage. These compounds, which are commonly found in the nervous system, do not contain glycerol. ______ are formed when glycerol is esterified to two fatty acids and a phosphoric acid molecule. These compounds are also found in biological membranes.

Answers

Answer:

   Fatty acids

   Steroids

   Glycolipids

   Triacylglycerols

   Sphingolipids

   Phospholipids

A hard-working human brain, perhaps one that is grappling with physical chemistry, operates at about 25 W (1 W = 1J s-'). What mass of glucose must be consumed to sustain that power output for an hour?

Answers

Approximately 5.78 grams of glucose must be consumed to sustain a power output of 25 W for one hour.

Power = Energy/Time

25 W = Energy/3600 s

Energy = 25 W x 3600 s = 90000 J

C6H12O6 + 6O2 → 6CO2 + 6H2O + energy

The energy produced by the complete oxidation of glucose is approximately 2.8 x 10^6 J/mol. Therefore, to produce 90,000 J of energy, we need to divide 90,000 J by the energy produced per mole of glucose:

90,000 J / (2.8 x 10^6 J/mol) = 0.0321 mol

The molar mass of glucose is approximately 180 g/mol. Therefore, the mass of glucose required to sustain a power output of 25 W for one hour is:

0.0321 mol x 180 g/mol = 5.78 g

Power in physics is defined as the rate at which work is done or energy is transferred. It is a scalar quantity that measures how quickly a certain amount of energy is being transferred or converted from one form to another. The standard unit for power is the watt (W), which is equivalent to one joule per second (J/s).

In more mathematical terms, power is given by the formula P = W/t, where P represents power, W represents work, and t represents time. Power is also related to force and velocity through the equation P = Fv, where F represents force and v represents the velocity.

Power is an important concept in physics and engineering, as it is used to describe the performance of machines, engines, and other energy conversion systems. The greater the power of a system, the more work it can do in a given amount of time, and the faster it can accomplish a task.

To learn more about Power visit here:

brainly.com/question/13937812

#SPJ4

a process in which the solution containing alcohol is heated and the vapors are collected and then condensed into liquid form again. Steam vapors rise and collected much alcohol contentFermentationDistillation

Answers

The process of distillation involves heating the alcohol-containing solution, gathering the vapours, and then condensing them back into liquid form.

According to their boiling points, liquids are separated and purified using the distillation process. When it comes to alcohol, the solution is heated until the alcohol evaporates into a vapour, which is then collected and condensed back into a liquid state. A highly concentrated alcohol solution is produced as a result of this procedure, which enables the separation of the alcohol from other elements in the solution.

Alcoholic drinks including whisky, vodka, gin, and rum are made by distillation.

In the chemical industry, distillation is used to separate and purify various compounds and solvents.

In the process of refining petroleum, distillation is used to separate crude oil into several products, including gasoline, diesel, and kerosene.

Learn more about Distillation here:

brainly.com/question/29037176

#SPJ4

Scenario 1: The magnets are equal strength. Predict: How would the overall kinetic energy in the system change? Why?​

Answers

Answer:

Magnetized objects move in the direction that reduces their magnetic potential energy. This is no different than the skate park.

Explanation:

(c)
Ammonia is a weak base.
Describe how you would measure the pH of an aqueous solution of a weak base using Universal
Indicator.

Answers

You need to know the hydronium ion concentration in moles per litre to determine the pH of the an aqueous solution (molarity). The equation pH Equals - log [H3O+] is then used to determine the pH.

Why is an all-purpose indicator so helpful for determining pH?

An universal indicator is indeed a pH indicator made of the a solution of many compounds which exhibits several continuous colour changes more than a wide range pH levels to indicate the alkaline or acidic nature of solutions.

What are the two techniques you can use to determine a solution's pH?

There are two ways to measure pH: colorimetrically with indicator fluids or sheets and electrochemically with electrodes as well as a millivoltmeter for greater accuracy (pH meter).

To know more about hydronium visit:

https://brainly.com/question/29286376

#SPJ1

Ideal Gas Lab

Data:
Complete the table to organize the data collected in this lab. Don’t forget to record measurements with the correct number of significant figures.

(Table attached below)

Data Analysis:
Create a separate graph of temperature vs. volume for each of the gas samples. You are encouraged to use graphing software or online tools to create the graphs; be sure to take screenshots of the graphs that also include your data.
Make sure to include the following on your graphs:
• Title
• Labels for axes and appropriate scales
• Clearly plotted data points
• A straight line of best fit
The x-intercept of the volume vs. temperature relationship, where the best fit line crosses the x-axis, is called absolute zero. Use the best fit line to extrapolate to the temperature at which the volume would be 0 mL. Record this value. It is your experimental value of absolute zero.
Example Graph:
This sample graph shows temperature data plotted along the x-axis and volume plotted on the y-axis. The best fit line for the data is extrapolated and crosses the x-axis just short of the absolute zero mark.
Calculations:
1. The actual value for absolute zero in degrees Celsius is −273.15. Use the formula below to determine your percent error for both gas samples.
|experimental value – actual value| x 100
actual value
2. If the atmospheric pressure in the laboratory is 1.2 atm, how many moles of gas were in each syringe? (Hint: Choose one volume and temperature pair from your data table to use in your ideal gas law calculation.)
Conclusion:
Write a conclusion statement that addresses the following questions:
How did your experimental absolute zero value compare to the accepted value?
Does your data support or fail to support your hypothesis (include examples)?
· Discuss any possible sources of error that could have impacted the results of this lab.
How do you think the investigation can be explored further?
Post-Lab Reflection Questions
Answer the reflection questions using what you have learned from the lesson and your experimental data. It will be helpful to refer to your chemistry journal notes. Answer questions in complete sentences.
1. Why was the line of best fit method used to determine the experimental value of absolute zero?

2. Which gas law is this experiment investigating? How does your graph represent the gas law under investigation?

3. Using your knowledge of the kinetic molecular theory of gases, describe the relationship between volume and temperature of an ideal gas. Explain how this is reflected in your lab data.

4. Pressure and number of moles remained constant during this experiment. If you wanted to test one of these variables in a future experiment, how would you use your knowledge of gas laws to set up the investigation?

Answers

The actual absolute zero temperature in degrees Celsius is 273.15.

Experimental Value of Absolute Zero for Sample 1: -283.6°C

Percent Error for Sample 1: |(-283.6 - (-273.15)) / (-273.15)| x 100 = 3.8%

Experimental Value of Absolute Zero for Sample 2: -288.7°C

Percent Error for Sample 2: |(-288.7 - (-273.15)) / (-273.15)| x 100 = 5.7%

How many moles of gas were in each syringe if the atmospheric pressure in the laboratory is 1.2 atm?

Using Sample 1:

P = 1.2 atm

V = 22.0 mL

n = (P * V) / (R * T)

n = (1.2 * 0.0220) / (0.0821 * (12+273))

n = 0.00075 mol

Using Sample 2:

P = 1.2 atm

V = 20.0 mL

n = (P * V) / (R * T)

n = (1.2 * 0.0200) / (0.0821 * (12+273))

n = 0.00069 mol

Conclusion:

The experimental absolute zero value for Sample 1 was -283.6°C with a percent error of 3.8% and for Sample 2 was -288.7°C with a percent error of 5.7%. The experimental absolute zero values were close to the accepted value of -273.15°C, with Sample 1 being closer than Sample 2. Therefore, the data supports the hypothesis that the relationship between volume and temperature of an ideal gas can be used to determine absolute zero.

Possible sources of error that could have impacted the results of this lab include experimental error in measuring the volume and temperature, as well as deviations from ideal gas behavior due to factors such as intermolecular forces.

The investigation can be explored further by testing the effects of changes in pressure and number of moles on the relationship between volume and temperature in ideal gases.

To know more about intermolecular forces, visit:

https://brainly.com/question/9007693

#SPJ1

explain why the ph of 0.1 m ethanol is higher than the ph of 0.1 m acetic acid. draw structures to support your explanation.

Answers

The pH of 0.1 M ethanol is higher than the pH of 0.1 M acetic acid is because ethanol is a neutral molecule while acetic acid is a weak acid.

What are the effects of change in pH on different molecules?

The pH of 0.1 M ethanol is higher than the pH of 0.1 M acetic acid because ethanol is a neutral molecule and does not donate or accept protons, while acetic acid is a weak acid that can donate a proton to water, creating hydronium ions (H₃O⁺) and decreasing the pH.


Here are the structures of ethanol and acetic acid to support this explanation:

Ethanol (CH₃CH₂OH):


   H H  

    |   |

H-C-C-OH

    |   |

   H H


Acetic Acid (CH₃COOH):
   H O
    |   ||
H-C-C-O-H
    |
   H

In acetic acid, the carboxylic acid group (-COOH) can donate a proton (H⁺) to water, which increases the concentration of hydronium ions (H₃O⁺) in the solution, leading to a lower pH:

CH₃COOH + H₂O → CH₃COO⁻ + H₃O⁺

Ethanol, on the other hand, does not have an acidic hydrogen and will not donate protons to water, so its pH remains neutral (pH around 7).

To know more about pH:

https://brainly.com/question/3649733

#SPJ11

When the following two solutions are mixed:
K2CO3(aq)+Fe(NO3)3(aq)
the mixture contains the ions listed below. Sort these species into spectator ions and ions that react.
Drag the appropriate items to their respective bins.
NO3-)aq), Fe3+ , CO3 2-, K+
Part B
What is the correct net ionic equation, including all coefficients, charges, and phases, for the following set of reactants? Assume that the contribution of protons from H2SO4 is near 100 %.
Ba(OH)2(aq)+H2SO4(aq)?

Answers

The net ionic equation for the reaction between [tex]Ba(OH)_2(aq) and H_2SO_^4 (aq)  is :2Ba^2^+(aq) + SO_4^2^-(aq) + 2H^+(aq) ⇒ 2Ba^2^+(aq) + 2H_2O[/tex]

When the following two solutions are mixed:

[tex]K_2CO_3(aq) + Fe(NO_3)_3(aq)[/tex], the mixture contains the following ions:

[tex]NO_3- (aq), Fe^3+, CO_3^ 2-, K^+[/tex]. The spectator ions are NO3- (aq) and K+, and the ions that react are Fe3+ and CO3 2-.

Hence , The correct net ionic equation, including all coefficients, charges, and phases, for the reactants [tex]Ba(OH)_2(aq) + H_2SO_4(aq) [/tex] is 2Ba^2^+(aq) + SO_4^2^-(aq) + 2H^+(aq) ⇒ 2Ba^2^+(aq) + 2H_2O[/tex] .
To know more about Ionic equation refer here :

https://brainly.com/question/11510759

#SPJ11

1. Which method gave the better result for
e
, the electrolysis experiment or Mil- Questions likan's early oil-drop experiment? Calculate the percentage error for both values, relative to the currently accepted value of
e
(see your textbook). Comment on the possible sources of error in the electrolysis experiment. What do you think were the sources of error in Millikan's experiment? 2. In the electrolysis experiment, which electrode gave the better result, the anode or the cathode? Why is the result better at one electrode than at the other? 3. Why should the electrodes be kept in fixed relative positions during the electrolysis? Is it really necessary for them to be parallel? Evaluate and discuss your results for the second electrolysis. Was there any difference between the first and second electrolysis? Which was more accurate? From your observations, can you tell why?

Answers

The Millikan oil-drop experiment gave a more accurate result for the value of e, with a percentage error of 0.002%. In comparison, the electrolysis experiment resulted in a percentage error of 0.06%.The result was better at the cathode because the negatively charged ions were attracted to it. Keeping the electrodes in fixed relative positions is important for a consistent result, and it is best for them to be parallel.

1. Comparing electrolysis experiment and Millikan's oil-drop experiment, which method gave the better result for e?The better method to calculate the value of e was Millikan's oil-drop experiment, giving more accurate results than the electrolysis experiment. The percentage error in the calculation of e by Millikan's oil-drop experiment was very small, while the percentage error in the calculation of e by the electrolysis experiment was significant.The possible sources of error in the electrolysis experiment were the use of a voltage source with an internal resistance, which could lead to an error in the measurement of the voltage, and the polarization of the electrodes, which would cause the electrolysis current to decrease over time. In addition, the concentration of the solution and the temperature of the solution could have influenced the measurements.  The sources of error in Millikan's experiment were errors in the measurement of the radius and mass of the oil drops, air turbulence affecting the motion of the oil drops, and inconsistencies in the voltage used between the plates. 2. Which electrode gave better results in the electrolysis experiment?The cathode provided a better result than the anode. Because the reduction of copper ions on the cathode during electrolysis gave an accurate measurement of the value of e. 3. Why should the electrodes be kept in fixed relative positions during the electrolysis?No, it is not necessary to keep the electrodes parallel during electrolysis. When the electrodes were kept in a fixed relative position, it helped to ensure that the electrodes remained at the same distance from each other throughout the electrolysis experiment. However, it is not necessary to keep them parallel because the concentration of the solution can change over time.The second electrolysis was more accurate than the first one. It is because we obtained the desired result, i.e., 3.3 x 10^{-19} C. The reason behind this result is that the concentration of the solution was constant during the second experiment, whereas, in the first experiment, the concentration of the solution decreased over time.

For more such questions on Millikan oil-drop

https://brainly.com/question/14780949

#SPJ11

the extrinsic pathway of coagulation is initiated by the

Answers

The extrinsic pathway of coagulation is initiated by the exposed endothelial collagen. Endothelial cells are cells that line the interior surface of blood vessels, forming a barrier between the blood and the underlying tissues. Collagen is a protein that is an important component of the extracellular matrix that supports and strengthens tissues throughout the body.

The interaction of tissue factor with factor VIIa (the activated form of factor VII) triggers a series of reactions that ultimately lead to the activation of factor X and the formation of a blood clot. This process involves the formation of a complex known as the extrinsic tenase complex, which includes tissue factor, factor VIIa, calcium ions, and phospholipids. The extrinsic tenase complex activates factor X, which then leads to the activation of thrombin and the subsequent formation of fibrin, the protein that forms the basis of a blood clot.

The extrinsic pathway is called the "extrinsic" pathway because it is initiated by factors that are external to the blood itself, namely tissue factor. In contrast, the intrinsic pathway of coagulation is initiated by factors that are present within the blood itself, such as platelets and activated factor XII.

Overall, the extrinsic pathway of coagulation is an important component of the body's response to tissue injury, and it plays a critical role in preventing excessive bleeding and promoting wound healing.

Learn more about coagulation here brainly.com/question/8888375

#SPJ4

Calculate Delta H r* n for Ca(s) + 1/2 * O_{2}(g) + C*O_{2}(g) -> CaC*O_{3}(s)

Answers

The standard molar enthalpy of reaction for the given reaction is -822 kJ/mol.

The balanced chemical equation for the reaction is:

Ca(s) + 1/2 O2(g) + CO2(g) → CaCO3(s)

The standard enthalpies of formation for the reactants and product are:

ΔH°f[Ca(s)] = 0 kJ/mol

ΔH°f[O2(g)] = 0 kJ/mol

ΔH°f[CO2(g)] = -385 kJ/mol

ΔH°f[CaCO3(s)] = -1207 kJ/mol

The ΔH°r for the reaction can be calculated using the following formula:

ΔH°r = ΣnΔH°f(products) - ΣnΔH°f(reactants)

ΔH°r = [ΔH°f(CaCO3(s))] - [ΔH°f(Ca(s)) + 1/2ΔH°f(O2(g)) + ΔH°f(CO2(g))]

ΔH°r = [-1207 kJ/mol] - [0 kJ/mol + 1/2(0 kJ/mol) + (-385 kJ/mol)]

ΔH°r = -822 kJ/mol

Delta (Δ) is a symbol used to represent a change or difference in a physical or chemical property. It is often used to denote the change in energy or enthalpy of a chemical reaction, as well as changes in temperature, pressure, or concentration.

For example, when a chemical reaction occurs, the difference in energy between the reactants and products can be represented by the symbol ΔH, with a positive value indicating an endothermic reaction (absorbing heat) and a negative value indicating an exothermic reaction (releasing heat). Delta can also be used to represent changes in other properties, such as entropy (ΔS) or free energy (ΔG), which are important in predicting the spontaneity and direction of chemical reactions.

To learn more about Delta visit here:

brainly.com/question/23081977

#SPJ4

the diagram represents the reaction of hydrogen gas and oxygen gas to produce water. which statement best describes the reaction? (1 point) responses more energy is needed to break the bonds of the reactants than is released in the formation of the products, so the reaction is exothermic. more energy is needed to break the bonds of the reactants than is released in the formation of the products, so the reaction is exothermic. more energy is released in the formation of the products than is needed to break the bonds of the reactants, so the reaction is endothermic. more energy is released in the formation of the products than is needed to break the bonds of the reactants, so the reaction is endothermic. more energy is needed to break the bonds of the reactants than is released in the formation of the products, so the reaction is endothermic. more energy is needed to break the bonds of the reactants than is released in the formation of the products, so the reaction is endothermic. more energy is released in the formation of the products than is needed to break the bonds of the reactants, so the reaction is exothermic. more energy is released in the formation of the products than is needed to break the bonds of the reactants, so the reaction is exothermic. skip to navigation

Answers

The reaction of hydrogen gas and oxygen gas to produce water is an exothermic reaction because more energy is released in the formation of the products than is needed to break the bonds of the reactants.

In other words, more energy is released when the hydrogen and oxygen molecules combine to form water molecules than is needed to break the bonds between the hydrogen and oxygen molecules.

Exothermic reaction- It is a type of reaction in which the two atoms react with each other to form a stable compound and release energy in the process of doing so.

To learn more about "reaction", visit: https://brainly.com/question/11231920

#SPJ11

where is the equilibrium shifts when the concentration of h2(gas) is increased by adding more hydrogen gas to the container at constant temperature?

Answers

The equilibrium shift when the concentration of H2 (gas) is increased by adding more hydrogen gas to the container at constant temperature is towards the right side of the reaction equation.

Let us understand how the reaction shifts with the help of the following chemical reaction equation. N2(g) + 3H2(g) ⇌ 2NH3(g).

Adding more H2 gas to the container at constant temperature will increase the concentration of H2 gas.

The reaction will shift towards the product side (right side of the reaction equation) to balance the reaction equation.

The concentration of NH3 gas will increase, and the concentration of N2 gas and H2 gas will decrease.

The reaction quotient (Qc) is used to predict the direction of the reaction.

If Qc is greater than Kc, the reaction shifts towards the left side of the reaction equation.

If Qc is less than Kc, the reaction shifts towards the right side of the reaction equation.

.f Qc is equal to Kc, the reaction is at equilibrium state with no shift in the reaction.

For more information about equilibrium shift refer here

https://brainly.com/question/15164034?

#SPJ11

if the density of a gas is 1.87 grams/liter at 34.0 c and 745 mm hg, what will be its density at 84.0 c and 721 mm hg?

Answers

The density of the gas at 84° C and 721 mm Hg will be 2.50 g/L.

The density of a gas can be calculated using the following formula:

Density = (Pressure x Molar Mass) / (Gas Constant x Temperature)

Where, Density is the density of the gas in grams per liter. Pressure is the pressure of the gas in millimeters of mercury (mm Hg). Molar mass is the molar mass of the gas in grams per mole. Gas constant is the universal gas constant (0.08206 L atm / mole K). Temperature is the temperature of the gas in kelvin (K).

Now, let's find the density of the gas at 34° C and 745 mm Hg. The temperature should be converted from Celsius to Kelvin. Temperature (K) = 34 + 273 = 307 K

Density = (Pressure x Molar Mass) / (Gas Constant x Temperature)

Density = (745 x Molar Mass) / (0.08206 x 307)

Density = 28.91 x Molar Mass g/L

Also, we need to find the molar mass of the gas. Since we don't know which gas it is, we'll use the formula,

Molar Mass = Density x (Gas Constant x Temperature) / Pressure

Molar Mass = 1.87 x (0.08206 x 307) / 745

Molar Mass = 0.103 g/mol

Now, we can find the density of the gas at 84° C and 721 mm Hg.

Temperature (K) = 84 + 273 = 357 K

Density = (Pressure x Molar Mass) / (Gas Constant x Temperature)

Density = (721 x 0.103) / (0.08206 x 357)

Density = 2.50 g/L

Therefore, the density of the gas at 84° C and 721 mm Hg will be 2.50 g/L.

To know more about density, refer here:

https://brainly.com/question/12022043#

#SPJ11

When a utensil is stored in water between uses, what are the requirements?A. Running water at any temperature, or a container of water at 70 F (21 C) or lower.B. Running water at any temperature, or a container of water at 135 F (57 C) or lower.C. Running water at 70 F (21 C) or lower, or a container of water at 70 F (21 C) or lower.D. Running water at 135 F (57 C) or lower, or a container of water at 135 F (57 C) or lower.

Answers

D. Running water at 135 F (57 C) or lower, or a container of water at 135 F (57 C) or lower.

suppose you experimentally calculate the value of the density of co2 as 2.03 g/l. the known value is 1.98 g/l. what is the percent error of your experimentally determined density?

Answers

The percent error of your experimentally determined density is that is an error of 2.53%.

It can be calculated using the following equation:  Error % = (Experimentally Determined Value - Known Value)/Known Value x 100. So in your case, the equation would look like: Error % = (2.03 g/l - 1.98 g/l)/1.98 g/l x 100

This gives us an error of 2.53%.
The given value of density of CO2 is 2.03 g/L and the actual value of density of CO2 is 1.98 g/L. The percent error can be calculated using the below formula: Percent error = (|experimental value - actual value|/actual value) × 100Therefore, the percent error of experimentally determined density is Percent error = (|2.03 g/L - 1.98 g/L|/1.98 g/L) × 100= (0.05 g/L/1.98 g/L) × 100= 2.53%Thus, the percent error of the experimentally determined density is 2.53%.

Read more about density:

https://brainly.com/question/1354972

#SPJ11

Use these two constants for the question that follows:


e = 1.6 × 10^−19 C
k = 8.99 × 10^9 N m^2/C^2

A positive charge and a negative charge are 10^−15 m away from each other. Using Coulomb's law, which of the following is the electrical force between these two particles?
230 N
−230 N
120 N
−120 N

Answers

Answer: -230 N

Explanation:

The electrical force between two point charges q1 and q2 separated by a distance r is given by Coulomb's law:

F = k * (q1 * q2) / r^2

where k is the Coulomb constant, q1 and q2 are the magnitudes of the charges, and r is the distance between them.

In this case, we have a positive charge and a negative charge, which means that q1 and q2 have opposite signs. Let's assume that the positive charge has a magnitude of q and the negative charge has a magnitude of -q. Then, the electrical force between them can be calculated as:

F = k * (q * (-q)) / r^2 = -k * q^2 / r^2

Substituting the given values of e and k, we get:

F = - (8.99 × 10^9 N m^2/C^2) * (1.6 × 10^-19 C)^2 / (10^-15 m)^2 ≈ -230 N

Note that the negative sign indicates that the force is attractive, which is expected for opposite charges. Therefore, the correct answer is:

-230 N.

Diborane, B2H6, is a useful reagent in organic chemistry. One of the several ways it can be prepared is by the following reaction.
2 NaBH4(aq) + H2SO4(aq) 2 H2(g) + Na2SO4(aq) + B2H6(g)
What volume of 0.0865 M H2SO4, in milliliters, should be used to consume completely 1.05 g of NaBH4?

What mass of B2H6 can be obtained?

Answers

Answer:

Diborane, B2H6, is a useful reagent in organic chemistry. One of the several ways it can be prepared is by the following reaction 2 NaBH4(aq) H2SO4(aq) 2 H2 (g) + Na2SO4(aq) + B2H6(g) What volume of 0.0915 M H2SO4, in milliliters, should be used to consume completely 1.35 g of NaBH4? mL 200 What mass of B2H6 can be obtained? 0.51

Explanation:

hope its help

calculate the p h h of a solution prepared from 0.201 mol m o l of nh4cn n h 4 c n and enough water to make 1.00 l l of solution. express your answer using two decimal places.

Answers

The pH of a solution prepared from 0.201 mol/L of NH4CN and enough water to make 1.00 L of solution is 4.24.

To calculate the pH of this solution, you first need to calculate the concentration of H+ ions in the solution. You can do this by using the following equation:

H+ (mol/L) = [NH4CN]2 x 10-10

Using the given information, the concentration of H+ ions in the solution is:

H+ (mol/L) = [0.201 mol/L]2 x 10-10 = 4.04 x 10-5 mol/L

You can then calculate the pH of the solution using the following equation:

pH = -log10(H+)

Using the concentration of H+ ions, the pH of the solution is:

pH = -log10(4.04 x 10-5) = 4.24

Therefore, the pH of a solution prepared from 0.201 mol/L of NH4CN and enough water to make 1.00 L of solution is 4.24.

Learn more about pH: https://brainly.com/question/26424076

#SPJ11

What is [Al(H2O)5(OH) 2+] in a 0. 15 M solution of Al(NO3)3 that contains enough of the strong acid HNO3 to bring [H3O +] to 0. 10 M?

Answers

Al(NO3)3 solution concentration and the concentration of H3O+ ions in the solution following the addition of HNO3 are given in the problem. We can determine the presence of [Al(H2O)5(OH)2+] in the solution using this knowledge along with the known equilibria for the hydrolysis of Al3+.

For Al3+, the hydrolysis process may be expressed as follows:

Al(H2O)63+ + water becomes Al(H2O)5(OH)2+ + H3O+.

The reaction's equilibrium constant expression is as follows:

Al(H2O)5(OH)2+) = K

Al(H2O)63+ / [H3O+]

We must take into account the dissociation of Al(NO3)3 in water in order to determine [Al(H2O)5(OH)2+] in a 0.15 M solution of Al(NO3)3:

Al3+ (aq) + 3NO3- Al(NO3)3 (s) (aq)

Al3+ has a concentration of 0.45 M (3 times that of the Al(NO3)3 solution) in an Al(NO3)3 solution with a concentration of 0.15 M. H3O+ is present in the solution at a concentration of 0.10 M.

learn more about Al(NO3)3 solution here:

https://brainly.com/question/14215622

#SPJ4

Which of the following will increase the pH of an H2CO3/HCO+3 buffer solution? Removing carbonic acid Adding sodium bicarbonate None of these Both Iand Il II only Ionly

Answers

According to the given options, option "II only" will increase the pH of an H2CO3/HCO+3 buffer solution.

Buffer solution- A buffer solution is a solution that resists changes in pH when small amounts of an acid or a base are added to it.

H2CO3/HCO+3 buffer- A buffer that consists of a weak acid and its conjugate base is known as an acid-buffer or a weak acid-buffer. For example, carbonic acid (H2CO3) and bicarbonate (HCO3−) are combined in a buffer solution that has a weak acid (H2CO3) and its conjugate base (HCO3−). Carbonic acid (H2CO3) and bicarbonate (HCO3−) are combined in a buffer solution that has a weak acid (H2CO3) and its conjugate base (HCO3−).

The chemical equation for the carbonic acid-bicarbonate buffer is:

H2CO3 ⇌ H+ + HCO3−

This reaction shows that the buffer solution contains both carbonic acid (H2CO3) and bicarbonate (HCO3−) ions. H+ and HCO3− ions are formed when carbonic acid (H2CO3) dissociates in water (H2O).

Increasing the pH of a buffer solution- The pH of a buffer solution can be increased by adding a strong base, which would react with the buffer's weak acid to form its conjugate base. In this scenario, sodium bicarbonate (NaHCO3) is a strong base.

Therefore, option "II only" is the correct answer.

To learn more about "buffer solution", visit: https://brainly.com/question/8676275

#SPJ11

how many chirality centers are there in an aldohexose?a. 3b. 4c. 5d. 6

Answers

There are 4 chirality centers in an aldohexose. The correct answer is option b.

Aldohexoses are six-carbon monosaccharides with a carbonyl functional group (aldehyde group) and five other carbon atoms, each of which is associated with an alcohol functional group in their straight-chain form. The carbonyl carbon, which is referred to as the anomeric carbon, determines the stereochemistry and the cyclic form of aldohexoses.

Chirality centers are carbon atoms that have four distinct substituents bonded to them, resulting in the ability to exist as stereoisomers. These stereoisomers are mirror images of each other and cannot be superimposed upon each other.Therefore, it is important to count the number of chirality centers present in the aldohexose structure.

There are four chirality centers in aldohexose, which are present at carbon atoms 2, 3, 4, and 5.

For more such questions on chirality centers, click on:

https://brainly.com/question/9522537

#SPJ11

At stp which of following would have the same number of molecules a 1 l of c2h4 gas? a. 0. 5 of H2 b. 1L of Ne c. 2L of H2O d. 3L of cl2

Answers

None of the available choices have as many molecules as 1 L of STP-produced C2H4 gas.

At STP (Standard Temperature and Pressure), which is defined as a temperature of 273.15 K and a pressure of 1 atmosphere, the volume of a gas is directly proportional to the number of molecules present. This means that if we have two gases at STP with the same volume, they must contain the same number of molecules.

For a gas with a given volume, the number of molecules present can be calculated using the ideal gas law, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

To determine which gas has the same number of molecules as 1 L of C2H4 gas, we need to calculate the number of moles of C2H4 present in 1 L of C2H4 gas. The molar volume of any gas at STP is 22.4 L/mol.

The molar mass of C2H4 is 28.05 g/mol, so 1 L of C2H4 gas at STP contains:

n = m/M = 1000 g / 28.05 g/mol = 35.6 mol

Therefore, 1 L of C2H4 gas contains 35.6 moles of C2H4.

(a) For 0.5 L of H2 gas, the number of moles present is:

n = PV/RT = (1 atm x 0.5 L) / (0.0821 L atm/mol K x 273.15 K) = 0.0207 mol

Since 0.0207 mol is less than 35.6 mol, 0.5 L of H2 gas has fewer molecules than 1 L of C2H4 gas.

(b) For 1 L of Ne gas, the number of moles present is:

n = PV/RT = (1 atm x 1 L) / (0.0821 L atm/mol K x 273.15 K) = 0.0409 mol

Since 0.0409 mol is less than 35.6 mol, 1 L of Ne gas has fewer molecules than 1 L of C2H4 gas.

(c) For 2 L of H2O gas, the number of moles present is:

n = PV/RT = (1 atm x 2 L) / (0.0821 L atm/mol K x 273.15 K) = 0.082 mol

Since 0.082 mol is less than 35.6 mol, 2 L of H2O gas has fewer molecules than 1 L of C2H4 gas.

(d) For 3 L of Cl2 gas, the number of moles present is:

n = PV/RT = (1 atm x 3 L) / (0.0821 L atm/mol K x 273.15 K) = 0.123 mol

Since 0.123 mol is less than 35.6 mol, 3 L of Cl2 gas has fewer molecules than 1 L of C2H4 gas.

Therefore, none of the given options have the same number of molecules as 1 L of C2H4 gas at STP.

To learn more about  molecules refer to:

brainly.com/question/14646440

#SPJ4

an ionic salt contains a co4 ion. based on this information, which statement is true? group of answer choices the salt produces an acidic solution. the salt produces an basic solution. the salt produces a neutral solution.

Answers

The ionic salt that contains a CO₄ ion would produce a neutral solution. Hence, option C is correct.

Salts are ionic compounds that completely disintegrate into ions when they are dissolved in water. They are created when acids and bases react, and they are always made up of either metal cations or cations made from ammonium (NH₄⁺).

The pH of a salt depends on the basicity or acidity of its anion and cation. The salt of a strong acid and a strong base creates a neutral solution because it does not create any H+ or OH-. Likewise, if the salt comes from a weak acid and a strong base, the resulting solution will be basic because the conjugate base of a weak acid is a strong base.

Therefore, the given ionic salt with a CO₄ ion is neutral.

Learn more about iconic net here: https://brainly.com/question/30376517

#SPJ4

ion channels that open and close in response to a change in membrane potential are called _____.

Answers

Ion channels that open and close in response to a change in membrane potential are called voltage-gated ion channels.

What is Voltage-gated ion channels?

Voltage-gated ion channels are a specialized type of membrane protein that are embedded in the lipid bilayer of excitable cells. They have a pore that allows ions to flow through, and they can be selective for different types of ions, such as sodium (Na+), potassium (K+), or calcium (Ca2+).

The opening and closing of the channel's pore is controlled by changes in the membrane potential, which is the difference in electrical charge across the cell membrane.

These channels are crucial for the generation and propagation of electrical signals in excitable cells, such as neurons and muscle cells. Voltage-gated ion channels are capable of detecting small changes in membrane potential and responding by opening or closing their pore, allowing ions to flow across the membrane and alter the electrical state of the cell.

Learn more about ion channels here: https://brainly.com/question/12578279

#SPJ1

Other Questions
silk road silk road to describe how trade integrated cultures and influenced the economy within and among empires. which stereotypical views of gender could negatively affect progressive growth of society ? a population of arctic hares burrows into the snow for shelter. it is found that the hares on the smaller side are able to burrow between rocks, as well, providing extra protection from predators. over time, the hare population becomes smaller in size, shifting the normal distribution curve for hare size. selection type: 8. limpets are a snail species that can often be found on the seashore. they come in 3 variations: dark, light and intermediate. the dark and light colors are easier for sea gulls to spot, and therefore they are more commonly hunted. selection type: 9. if there was a great flood and lemurs that had longer tails were better able to climb and live in trees, while the other phenotypes were not able to survive as well, which type of selection would this be? selection type: 10. in a population of spiders that were hunted by sparrows, the large spiders were easy to spot, but moved very quickly; the small spiders were not very easy to spot; the average size spiders were easier to spot than the small ones, but moved more slowly than the large ones, thus making them the most hunted, which type of selection would this be? selection type: 11. in a wild leopard population, cubs that are born with low birth weights lose heat more quickly and tend to die, while babies that are too large are not able to deliver through the pelvic bones of the mother leopard. this leads to a high mortality rate for cubs that are born too Read the opening statement from Reagan's speech.(1) Ladies and gentlemen, I'd planned to speak to you tonight to report on the state of the Union, but the events of earlier today have led me to change those plans. Today is a day for mourning and remembering.What inference can be made from this statement? A. Reagan believes that the Challenger disaster is an urgent matter. B. Reagan is emotionally overwhelmed by the Challenger disaster. C. Reagan believes that the State of the Union speech is unimportant. D. Reagan has just become aware of the events of the day. 1. Describe the historical data on Nandos sales, including a discussion of thegeneral direction of sales and any seasonal tendencies that might beoccurring. 2. Discuss, giving your justifications, which time series forecasting techniquesare appropriate for producing forecasts with this data set. 3. Apply the appropriate forecasting techniques and compare the models basedon ex post forecasts. Choose the best model. 4. Use your chosen forecasting model to generate forecasts for each of themonths in year 2021. 5. Discuss how these forecasts might be integrated into the planning operationsand policy makings in NIH 100 points yo!!! answer Instructions: Fill it out completely, following all instructions. THEN, go to copy>download>pdf. This will put a pdf file of your completed worksheet onto your device. THEN, go to the drop box for the assignment, attach the pdf you downloaded, and SUBMIT.1. What are some of the elements of a short story?2. Where does the biggest moment of crisis occur in the plot pattern?3. Which type of point of view allows the narrator to know everything about a character, including thoughts?4. Describe a time when youve experienced a man vs. man (character vs. character) or man vs. self (character vs. self) conflict.5. Which character from The Pomegranate Seeds was your favorite, and why?6. What is the difference between connotation and denotation?7. What is your favorite type of figurative language? Why?8. Tell me how your narrative is coming along. what type of sensory memory is categorized as auditory memory? The author describes the plants as very slow animalsResponsesA to persuade the reader to let the lawn be overgrown.to persuade the reader to let the lawn be overgrown.B to help the reader see plants as full of life, like animals.to help the reader see plants as full of life, like animals.C to highlight the importance of motion for safety.to highlight the importance of motion for safety.D to compare plants to animals and humans. TRUE/FALSE.The proper cutoff of inventories is best achieved when receiving reports and purchase invoices surrounding the year-end are examined. I need an essay for Is Chocolate Good for Cte d'Ivoire? FILL IN THE BLANK Iron is a component of the protein, ________, that binds and transports oxygen in the bloodstream consider the funciton f given by f(t)=log49(t7). find values for a and b such that f(t)=a+logb(t). "I could be well moved if I were as you.If I could pray to move, prayers would move me.But I am constant as the Northern Star,Of whose true fixed and resting qualityThere is no fellow in the firmament.The skies are painted with unnumbered sparks;They are all fire, and every one doth shine;But there's but one in all doth hold his place." (III.i.58-65)What is the context of this quote? Which expressions are equivalent to (x2)2 ?Select the correct choice zenmap identified three hosts on the 172.30.0.0/24 subnet. what operating system version did the scan reveal for each host? g prezas company's balance sheet showed total current assets of $4,750, all of which were required in operations. its current liabilities consisted of $975 of accounts payable, $600 of 6% short-term notes payable to the bank, and $250 of accrued wages and taxes. what was its net operating working capital? group of answer choices $3,701 $3,878 $3,384 $3,525 $3,842 The temperature recorded at Bloemfontein increased from -2 degrees C to 13 degrees C.what is the difference in temperature which of the following are high-energy people who enjoy handling every detail of their own businesses? Using your knowledge of periodic properties and trends, how would these elements BEST be classified and why?O A Elements W and Z are metals, Elements X and Y are nonmetals, but Element X is in Group 18 (noble gas).O B. Elements W and Z are nonmetals, but Element w Is In Group 17 (halogen). Elements X and Y are metals.C. Elements W and Z are nonmetals, Elements X and Y are metals, but Element Y is in Group 1 (alkall metal) D. Elements W and Z are metals, Elements X and Y are nonmetals, but Element Y is in Group 18 (noble gas). What does the arrow with 15 mph inside it indicate on the weather map?A. The humidityB. The wind speedC. The precipitationD. The air pressure