Answer:
It depends on the state.
Explanation:
Phosphorus sesquisulfide (p4s3) is a poor conductor of electricity because it is an ionic compound which is present in solid form. Ionic compounds in solid form are poor conductors of electricity due to tightly holding of their ions to one another while on the other hand, it is a good conductor of electricity in molten or liquid form due to its movement of ions in the liquid so it depends on the state of the compound.
Calcular la m y M de una concentración Porcentual 45% m/m, la cual tiene una D solución 1.25 g/ml y una masa de sto de 125g.HN03
Explanation:
Calculate the "m" and "M" of a percentage concentration of 45% m / m, which has a solution D 1.25 g / ml and a mass of 125g.
Given data is:
The mass % of the solution is 45%.
The density of the solution is 1.25 g/mL.
The mass of the solution is 125 g.
Molarity of solution is:
[tex]M=\frac{number of moles of solute}{volume of solution}[/tex]
The volume of the solution is:
[tex]Volume=\frac{mass}{density} \\=125 g / 1.25 g/ml\\=100 mL[/tex]
From mass% of the solution, the mass of solute HNO_3 can be calculated.
[tex]mass percent=\frac{mass of solute}{ mass of solution} \\45=(mass of HNO_3/125 g)x100\\\\mass of solute = 56.25g[/tex]
The number of moles of HNO3 is :
[tex]n_H_N_O__3=\frac{m_H_N_O__3}{M_H_N_O__3}[/tex]
[tex]=56.25 g/63.00g/mol\\\\=0.893mol[/tex]
The molarity is:
[tex]M=n/V\\M=0.893 mol/0.1L\\M=8.93 M[/tex]
The molality is:
[tex]m=n/mass of solvent in kg\\ =0.893 mol /(0.125-0.05625)kg\\ = 12.9 m[/tex]
The Clean Air Act legislation of 1970, 1977, and 1990 was designed to improve air quality in the United States by monitoring and reducing the emissions of air pollutants judged to pose threats to human health, such as carbon monoxide, nitrogen dioxide, sulfur dioxide, ozone, particulate matter, and lead. The main source of lead emissions in 1970 was the exhaust of vehicles burning gasoline to which tetra-ethyl lead had been added to improve combustion. By 1985, leaded gasoline was phased out of use, although airplanes and racecars were exempted. The 1990 amendments addressed the growing problem of urban smog by
Answer:
The 1990 amendments addressed the growing problem of urban smog by acid rain.
Explanation:
As shown in the above question, the Clean Air Act was created with the goal of making the US air healthier, while also aiming to reduce the impacts of pollution on the American population. This law had as its main objective to reduce the emission of gases capable of polluting the atmosphere, especially those resulting from the burning of gasoline in cars. In 1990, a new amendment was added to this law. This amendment aimed to reduce emissions of sulfur dioxide and nitrogen oxides, as they were the main cause of acid pollution, which was responsible for acid rain that is extremely dangerous and negative for society.
I. En un laboratorio se hizo reaccionar una disolución de ácido sulfúrico (H2SO4) con otra de hidróxido de sodio (NaOH), ambos acuosos. Para formar sulfato de sodio (Na2SO4) y 2 moléculas de agua (H2O) líquido. Completa en relación con la ecuación química que representa la reacción:
Answer:
In a laboratory, a solution of sulfuric acid (H2SO4) was reacted with another of sodium hydroxide (NaOH), both aqueous. To form sodium sulfate (Na2SO4) and 2 molecules of liquid water (H2O). Complete in relation to the chemical equation that represents the reaction:
Explanation:
The balanced chemical equation of the reaction is:
[tex]H_2SO_4(aq)+2NaOH(aq)-> Na_2SO_4(aq)+2H_2O(l)[/tex]
Thus, one mole of sulfuric acid reacts with two moles of sodium hydroxide.
2.0 kilograms of lithium hydroxide can “scrub”, or remove, how many liters of carbon dioxide at standard conditions?
Answer:
0.94 L
Explanation:
The equation of the reaction is;
2LiOH + CO2 -----> Li2CO3 + H2O
Number of moles LiOH = 2.0/23.95 g/mol = 0.084 moles
2 moles of LiOH scrubs 22.4 L of CO2
0.084 moles of LiOH scrubs 0.084 moles × 22.4/2
= 0.94 L
Combustion reactions typically involve all of the following except
a. The consumption of oxygen gas
b. The production of a Hydrocarbon
c. The production of water
d. The release of carbon dioxide
Answer:
b. The production of a HydrocarbonExplanation:
In Combustion reaction usually occurs when a hydrocarbon reacts with oxygen to produce carbon dioxide and water.
Which molecule will have the strongest LDF
Answer: Try to get answer in Explanation
Explanation: Kr has a greater number of polarizable electrons (36 electrons), so Kr would have a greater degree of LDFs and therefore a greater melting point than N 2 (which has 7 × 2 = 14 polarizable electrons).
Butane (C4H10(9), AH = -125.6 kJ/mo) reacts with oxygen to produce carbon dioxide (CO2. AH+ = -393.5 kJ/mol) and
water (H20, AH+ = -241.82 kJ/mol) according to the equation below.
2C4H10(g) + 1302(g) → 8C02(g) + 10H2O(g)
What is the enthalpy of combustion (per mole) of C4H10(9)?
Use AH yen-(AHproducts) - ( He reactants)
-2,657.5 kJ/mol
0-5315.0 kJ/mol
--509.7 kJ/mol
O-254.8 kJ/mol
Answer:
ΔH = -5315kJ/mol
Explanation:
Based on Hess's law, ΔH of a reaction is defined as the sum of the ΔH of the products times their reaction coefficient - The sum of the ΔH of the reactants times their reaction coefficient.
For the reaction of the problem, ΔH is:
ΔH = 8ΔH CO2 + 10ΔH H2O - (2ΔH C4H10 - 13ΔH O2)
Where:
ΔH CO2 = -393.5kJ/mol
ΔH H2O = -241.82kJ/mol
ΔH C4H10 = -125.6kJ/mol
ΔH O2 = 0kJ/mol because O2(g) is the state of oxygen under STP.
Replacing:
ΔH = 8*(-393.5kJ/mol) + 10*(-241.82kJ/mol ) - (2*-125.6kJ/mol - 13*0kJ/mol)
ΔH = -5315kJ/mol
. The method of spreading the seeds manually in the leveled ground for crops to grow is called
Answer:
The process of sowing seeds manually called broadcasting or manual sowing. Broadcasting is a method of sowing by scattering seeds all over the prepared soil surface. Crop seeds like wheat, paddy, methi, coriander etc. are sawn in this method.
A nut cracker is second lever. Give reason.
Answer:
the load is between the fulcrum and the handle
Explanation:
How is thermal energy distributed in most heating systems?
A.
convection
B.
conduction
C.
radiation
Answer:
By Convection
Explanation:
What is nascent hydrogen?
Answer:
[H]
Explanation:
This is nascent hydrogen it's a reactive form of hydrogen...
It reduces elements and compounds.
Consider an experimental run at 273 K where the initial number of moles (n1) is actually 1.00 mol, and the final number of moles (n2) is 2.00 mol. Use the simulation to find the volume (V1) of 1.00 mol of helium at 273 K, and calculate the final volume (V2).
Express the volume to three significant figures, and include the appropriate units.
Answer: The volume [tex](V_{1})[/tex] of 1.00 mol of helium at 273 K is 22.4 L and the final volume [tex](V_{2})[/tex] is 44.8 L.
Explanation:
Given: [tex]T_{1}[/tex] = 273 K, [tex]n_{1}[/tex] = 1.00 mol
[tex]T_{2}[/tex] = 273 K, [tex]n_{2}[/tex] = 2.00 mol
At the standard pressure, 1 atm the value of [tex]V_{1}[/tex] and [tex]V_{2}[/tex] is calculated as follows.
[tex]V_{1} = \frac{n_{1}RT_{1}}{P}\\= \frac{1.00 mol \times 0.0821 Latm/mol K \times 273 K}{1 atm}\\= 22.4 L[/tex]
Similarly,
[tex]V_{1} = \frac{n_{2}RT_{2}}{P}\\= \frac{2.00 mol \times 0.0821 Latm/mol K \times 273 K}{1 atm}\\= 44.8 L[/tex]
Thus, we can conclude that the volume [tex](V_{1})[/tex] of 1.00 mol of helium at 273 K is 22.4 L and the final volume [tex](V_{2})[/tex] is 44.8 L.
How much of a sample remains after five half-lives have occurred?
1/5 of the original sample
1/25 of the original sample
1/32 of the original gample
1/64 of the original sample
Answer:
1/32
Explanation:
the number of atoms in 2 moles of aluminium is if the 1mole is 6.022*10 the power of 23 or 10^23
Answer:
1.204 × 10²⁴ atoms
Explanation:
According to this question, one mole of aluminum (Al) atom contains 6.02 × 10²³ atoms.
If two moles of aluminum are given, this means that there will be 2 × 6.02 × 10²³ atoms of aluminum
2 × 6.02 × 10²3
= 12.04 × 10²³
= 1.204 × 10²⁴ atoms.
When it’s summer in the northern hemisphere what Season is it in the Southern Hemisphere
Answer:
Winter
Explanation:
I dont know but whatev
Answer:
Winter
Explanation:
The seasonal cycle in the polar and temperate zones of one hemisphere is opposite to that of the other. Therefore, When it is summer in the Northern Hemisphere, it is winter in the Southern, and vice versa.
hope it helps :)
How many atoms of hydrogen are there in 36 g of NH4?
Answer:
hope it helps you
Explanation:
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what is the organic molecule
Answer:
kinetic energy is the molecules
Explanation:
A molecule of the kind normally found in living systems. Organic molecules are usually composed of carbon atoms in rings or long chains, to which are attached other atoms of such elements as hydrogen, oxygen, and nitrogen.
Plz Help I have One more time To retake and I can't fail it..
Answer:
D
Explanation:
A synthesis reaction is a reaction in which two or more reactants combine to form a given product.
If we look closely at option D, you will notice that sulphur and oxygen combined together to form sulphur dioxide. That is a typical example of chemical synthesis.
Hence;
S + O2 ----->SO2 is a synthesis reaction.
(06.01 MC)
Part 1. A glass bottle, which is half-filled with water, has a balloon attached to its
opening. The bottle is placed in a hot water bath for some time. Explain the change
to the size of the balloon based on the kinetic molecular theory.
Part 2. What would most likely happen to the balloon if the bottle was then placed
into a jar of cold water with ice cubes? Explain your answer based on the kinetic
molecular theory
In both cases, assume the balloon is attached tightly enough so that air does not
escape the system. (10 points)
Answer:
See explanation
Explanation:
According to the kinetic theory, a gas temperature is a measure of the average kinetic energy of the molecules of the gas. Thus, when the balloon is attached to the opening of a glass bottle placed in a hot water bath for some time, the molecules of the gas inside the balloon acquire greater kinetic energy and move faster. Hence, the molecules spread out and the gas expands - its size increases.
When the bottle is placed into a jar of cold water with ice cubes, the molecules of the gas loose energy and begin to coalesce. As a result of this, the volume of the gas decreases and the balloon shrinks. This is a demonstration of Charles law.
Answer:
According to the kinetic theory, a gas temperature is the measure of the average kinetic energy of the molecules of gas. Thus, when the balloon is attached to the opening of a glass bottle placed in a hot water bath for some time, the molecules of gas inside the balloon acquire greater kinetic energy thus moving faster. Hence, the molecules spread out and the gas expands thus expanding the balloon.
When the bottle is placed in a cold jar of cold water with ice cubes, the molecules of the gas loose energy thus decreasing the speed of the molecules within the gas. As a result of this, the size of the balloon should begin to shrink and so does the volume of the gas. Therefore, innately showing a demonstration of Charles' law of gasses which is the law that the volume of gasses is proportional to the temperature, (if the volume increases so does the temperature and vice versa).
Explanation:
I took the exam and go tthis question correct.
The volume of a gas at 6.0 atm is 2.5 L. What is the volume of the gas at 75 atm at
the same temperature? (5 points)
1) 1.0 L
0 2 2) 1.5 L
3) 2.0 L
O 4) 3.0L
The volume of a gas at 6.0 atm is 2.5 L. What is the volume of the gas at 7.5 atm at
the same temperature? (5 points)
1) 1.0 L
2) 1.5 L
3) 2.0 L
4) 3.0L
Answer:
2.0 L
Option C) 2.0L is the correct answer.
Hence, at the same temperature, as the pressure is increased to the given value, the volume of the gas decreases to 2.0L.
Boyle's law
Boyle's law states that "the volume V of a given quantity of gas is inversely proportional to its pressure P as long as temperature remains constant.
Boyle's law is expressed as;
P₁V₁ = P₂V₂
Given the data in the question;
Initial Volume V₁ = 2.5LInitial pressure P₁ = 6.0atmFinal pressure P₂ = 7.5atmFinal volume V₂ = ?To determine the final volume of the gas, we substitute our given values into the expression above.
P₁V₁ = P₂V₂
V₂ = P₁V₁ / P₂
V₂ = ( 6.0atm × 2.5L ) / 7.5atm
V₂ = 15Latm / 7.5atm
V₂ = 2.0L
Option C) 2.0L is the correct answer.
Hence, at the same temperature, as the pressure is increased to the given value, the volume of the gas decreases to 2.0L.
Learn more about Boyle's law here: brainly.com/question/1437490
A gas that was heated to 150 Celsius has a new volume of 1587.4 L. What was its volume when its temperature was 100 Celsius?
Answer:
[tex]\boxed {\boxed {\sf 1058.3 \ L}}[/tex]
Explanation:
We are asked to find the new volume of a gas after a change in temperature. We will use Charles's Law, which states the volume of a gas is directly proportional to the temperature. The formula for this law is:
[tex]\frac {V_1}{T_1}= \frac{V_2}{T_2}[/tex]
The gas was heated to 150 degrees Celsius and had a volume of 1587.4 liters.
[tex]\frac {1587.4 \ L }{150 \textdegree C} = \frac {V_2}{T_2}[/tex]
The temperature was 100 degrees Celsius, but the volume is unknown.
[tex]\frac {1587.4 \ L }{150 \textdegree C} = \frac {V_2}{100 \textdegree C}[/tex]
We are solving for the volume at 100 degrees Celsius, so we must isolate the variable V₂. It is being divided by 100°C and the inverse of division is multiplication. Multiply both sides of the equation by 100°C.
[tex]100 \textdegree C *\frac {1587.4 \ L }{150 \textdegree C} = \frac {V_2}{100 \textdegree C} * 100 \textdegree C[/tex]
[tex]100 \textdegree C *\frac {1587.4 \ L }{150 \textdegree C} = V_2[/tex]
The units of degrees Celsius cancel.
[tex]100 *\frac {1587.4 \ L }{150 } = V_2[/tex]
[tex]100 *10.58266667 \ L = V_2[/tex]
[tex]1058.266667 \ L = V_2[/tex]
The original measurement of volume has 5 significant figures, so our answer must have the same. For the number we calculated, that is the tenth place. The 6 in the hundredth place to the right tells us to round to 2 up to a 3.
[tex]1058.3 \ L = V_2[/tex]
The volume of the gas at 100 degrees Celsius is approximately 1058.3 liters.
If the [OH1-] of a solution at 25oC is 5.8x10^(-5) mol/L, calculate the [H1+] in mol/L, the pH, and the pOH.
Answer:
1. [H⁺] = 1.58×10¯¹⁰ mol/L
2. pH = 9.8
3. pOH = 4.2
Explanation:
We'll begin by calculating the pOH of the solution. This can be obtained as follow:
Concentration of Hydroxide ion [OH¯] = 5.8×10¯⁵ mol/L
pOH =?
pOH = –Log [OH¯]
pOH = –Log 5.8×10¯⁵
pOH = 4.2
Next, we shall determine the pH of the solution. This can be obtained as follow:
pOH = 4.2
pH =?
pH + pOH = 14
pH + 4.2 = 14
Collect like terms
pH = 14 – 4.2
pH = 9.8
Finally, we shall determine the concentration of Hydrogen ion [H⁺] in the solution. This can be obtained as follow:
pH = 9.8
Concentration of Hydrogen ion [H⁺] =?
pH = –Log [H⁺]
9.8 = –Log [H⁺]
Multiply through by –1
–9.8 = Log [H⁺]
Take the anti log of –9.8
[H⁺] = antilog (–9.8)
[H⁺] = 1.58×10¯¹⁰ mol/L
SUMMARY:
1. [H⁺] = 1.58×10¯¹⁰ mol/L
2. pH = 9.8
3. pOH = 4.2
Calculate the molar mass of the following compound: Ca3P2
Answer:
The molar mass of the compound given is 182.182 g/mol.
Explanation:
To calculate the molar mass of the compound, we must multiply the number of moles of each element by the the individual molar mass of each element and add them together.
Let's start with Calcium. The molar mass of Calcium is 40.078. In this compound, we have three moles of Calcium, so we should multiply this number by 3.
40.078 g/mol * 3 mol = 120.234 g
Now, let's do the same for Phosphorus.
30.974 g/mol * 2 g/mol = 61.948 g
To find the molar mass of the entire compound, we should add these two values together.
120.234 g + 61.948 g = 182.182 g
Therefore, the correct answer is 182.182 g/mol.
Hope this helps!
A mixture of reactants and products for the reaction shown below is at equilibrium in a 5.0 L container what would most likely happen to the equilibrium if the volume of the container will reduced to 3.0 L?
Since the volume decreased, it means that the pressure is going to rise. Thus, the equilibrium of the reaction will shift in the direction that has the least amount of moles.
The statement, that describes the equilibrium "will change in the direction with the minimum moles."
What is an equilibrium?A condition of equilibrium has become one of balance. Chemical equilibrium is the state in which both the reactants and products are present in concentrations that have no further tendency to change with time, resulting in no observable change in the system's properties.
When volume decreases, the equilibrium shifts to favor the direction that produces fewer moles of gas. When the volume is raised, the equilibrium shifts in favor of the direction that produces the most moles of gas. Because the container's volume will be lowered from 5.0 L to 3.0 L, the pressure will rise. As a result, the equilibrium of the reaction will shift in the direction with the fewest moles. When the volume is reduced, the pressure rises. This demonstrates that a gas's pressure is inversely proportional to its volume.
Hence the correct answer is equilibrium will change in the direction with the minimum moles.
Learn more about equilibrium here
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If 3.5 kJ of energy are added to a 28.2 g sample of iron at 20 degrees C, what is the final temperature of the iron in kelvins?
295.8k
that is the procedure above
What must scientists look for in their experiment or their data to make sure it is accurate?
Answer:
Scientists must look in their experiment/data to check for accuracy because they don't want to make any mistakes, and most importantly have to make sure they have the right information to proceed.
Explanation:
^
Element X and Y are two different elements that are placed in the same group in the Periodic Table of Elements. Which of the following statements is correct about their atoms?
A Atoms of element X and Y have same number of electrons
B Atoms of element X and Y have different number of protons
C Number of neutrons for atom X and Y changes during formation of an ion
D Nucleon number for atom X and Y is the total number of protons and electrons
Answer:
A Atoms of element X and Y have same number of electrons
what is a measureing tape used for
Answer:
It is used to measure size or distance.
Answer:
it is used to measure long heights and distances and lengths,it is yellow and goes round
Explanation:
A piece of calcium metal was reacted with excess dilute acid to produce hydrogen gas. The gas was collected at SLC. If 4.58g of calcium reacted, what volume of hydrogen gas will be collected?
10g-4.58=4.42g volume of hydrogen gas
Which of the following would allow you to find the volume of an irregular shaped solid object?
a: triple beam balance
b: l × b × h
c: water displacement
d: hight × length × width
Answer:
water displacement
that is c
