a sample of nitrogen gas occupies a volume of 2.00 L at 756 mm Hg and 0.00 C. the volume increases by 2.00 L and the temperature decreases to 137 K. what is final pressure exerted on the gas?

6 moles of water will be produced. after analyzing the stoichiometry of the equation, where the number of water molecules is divided by the molecular mass of water which is 18 grams.

What are Moles?

Standard scientific unit for calculating the number of atoms, molecules, or other specific particles in vast amounts. The mole designates 6.02214076 × [tex]10^{23}[/tex] units, which is a very large number.

What is Stoichiometry?

To calculate the appropriate quantitative data, a chemistry concept known as stoichiometry uses relationships between the reactants and/or products of a chemical reaction. Understanding the relationships that exist between products and reactants and why they exist, which necessitates understanding how to balance reactions, is crucial before using stoichiometry to perform calculations regarding chemical reactions.

6 moles of water will be produced.

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Vehicles are modes of transportation that are used to travel from one place to another. Examples of vehicles include cars, buses, motorcycles, boats, and airplanes.

Cars are the most common type of vehicle, and they are used for everyday transportation. They typically have four wheels and an internal combustion engine that runs on gasoline or diesel fuel.

Buses are a type of vehicle that is used for public transportation. They are usually larger than cars and have more seating capacity.

Motorcycles are a type of vehicle that is designed for one or two people and has two wheels. They are powered by an internal combustion engine and are typically smaller than cars.

Boats are a type of vehicle that is used for traveling on water. They are powered by an engine or by sails and are typically used for recreation or transportation. Airplanes are a type of vehicle that is used for long-distance transportation. They are powered by jet engines and are capable of reaching high speeds and altitudes.

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The way to write a letter that Thomson might have sent to another scientist explaining why an atom must contain positive charges as well as negative charges is given below

A formal letter is written for official purposes, such as to express concerns while working in a professional setting, to share official information at your workplace, to place an order for goods, to apply for a job, to the Editor of a newspaper addressing the issues faced by various groups of people in various areas, etc.

Therefore, since the letter above is not to someone that is a close friend or family, it will be a formal letter.  formal letter must have the recipient's address, the sender's address, the date, the salutation, the body of the letter, a complimenting close, and the signature with the recipient's name (in block letters) and designation.

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Formulas for temperature conversion involve converting temperature values between different units. Numerous techniques exist for converting temperatures. These include Kelvin, Celsius.

Such techniques are the ones that are most frequently used. The concept of temperature is used to convey quantitatively how hot and cold something is. Using a thermometer, one can gauge temperature. Thermometers are calibrated using different temperature scales that traditionally relied on different reference points and thermometric materials for definition. The Celsius scale, one of two temperature scales used in the International System of Units (SI), along with the Kelvin scale, uses degrees Celsius as its unit of measurement. The Celsius scale was first known as the centigrade scale outside of Sweden.

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Both oxygen and iodine are non-metals. Neither contributes electrons to achieve octet stability. Instead of forming an ionic bond, these two electrons are shared to form a covalent bond.

If these two compounds react to form a compound, that compound is considered an ionic compound. The ionic form of rubidium is Rb+, while the ionic form of sulfur is S2-. Sodium reacts with oxygen to form ionic compounds.

On the other hand, sodium chloride contains ions. It is an ionic compound. Ionic compounds contain ions that are held together by attractive forces between oppositely charged ions. Table salt is one of the best-known ionic compounds. Rubidium is a positive element. It actively donates its single valence electron to form a positively charged cation.

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The molar concentration of the initial calcium chloride solution is 0.252M.

Molar concentration or molarity refers to the concentration of a substance in solution, expressed as the number moles of solute per litre of solution.

According to this question, the EDTA binds calcium ions in a titration procedure in a 1:1 ratio. If the titration was begun with 247mL of calcium chloride, the molar concentration used initially can be calculated as follows:

CaVa = CbVb

Where;

Ca × 247 = 1.69 × 36.8

247Ca = 62.192

Ca = 62.192 ÷ 247

Ca = 0.252M

Therefore, 0.252M is the molar concentration of the calcium chloride solution.

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A) The final volume is V₂ = 14.86 L

B) The initial volume is V₁ = 490.5 mL

C) The final number of moles is n₂ = 0.0025

D) The initial moles is n₁ = 0.00088

Avogadro's law states that the total number of moles of a gas is directly proportional to the volume of the gas at a constant temperature and pressure.

Therefore, V ∝ n

or,  [tex]{\displaystyle {\frac{V_1}{n_1} =\frac{V_2}{n_2}[/tex]

Given the V₁ = 24.6 L, n₁ = 5.10 mol, n₂ = 3.09 mol

V₂ = V₁ n₂/V₁ = (24.7)(3.07)/5.10

V₂ = 14.86 L

V₂ = 419mL, n₁ = 1.07 mol, n₂ = 0.914 mol

V₁ = V₂ n₁/n₂ = (419)(1.07)/0.914

V₁ = 490.5 mL

Given the V₁ = 8.72 L, n₁ = 0.0020 mol, V₂ = 10.7 L

n₂ = V₂ n₁/V₁ = 10.7 ×0.0020/8.72

n₂ = 0.0025

Given the V₁ = 56 mL, V₂ = 17 mL, n₂ = 0.00268 mol

n₁ = n₂ V₁/V₂ = 0.000268 × 56/17

n₁ = 0.00088

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lithification is a complex process where sediments are compact under pressure, expel connate fluids and converted into solid rock.

A rock is the collection of solid (grains) mineral materials that grow or become cemented together. it can be a natural substance composed of solid crystals of different minerals that have been blend together into a solid lump.

The major types of rocks are:

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The hazards in batteries are battery acids, flammable gases, electrical shock and battery weight.

There are many hazards in batteries. Those are,

Battery acids: The electrolyte in a battery is corrosive and can burn skin or eyes, eat holes in clothing, or even etch a concrete floor.

Flammable gases: Batteries emit hydrogen gas, which is flammable. It ignites easily and can cause a fire or explosion if allowed to accumulate in a small area.

Electrical shock: Many of us are aware of this danger because we may have seen sparks fly when jumper cables are attached to a car.

Battery Weight: Batteries, like those used in forklifts, are heavy and require proper material handling equipment to lift them safely.

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The partial pressure A is 6.14 and that of  of B is 5.89 atm Thus the mole fraction of B is 0.49.

Mole fraction of a component in a mixture is the ratio of its number of moles to the sum of number of moles all the components in the mixture.

The mole fraction of a gas if their partial pressures are given is the ratio of its partial pressure to the total pressure of the mixture. Here the partial pressure of A is 6.14 and that of B  is 5.89 atm.

The mole fraction of B = Pb/ (Pa + Pb)

                                      = 5.89 atm  / (6.14 + 5.89 atm)

                                      = 0.49

Therefore the mole fraction of gas B in the mixture is 0.49.

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While turbid waterways are characterized by large levels of suspended particles that obscure visibility by absorbing and reflecting light, clear waters are low quantities of suspended soil particles and/or algae.

Water clarity can be impacted by a variety of factors, including suspended particles, algae growth, runoff, shoreline erosion, wind mixing of the lake bottom, and tannic and humic acids from wetlands.

Water clarity problems are mostly caused by nutrient and sediment pollution. Excess nutrients can encourage the growth of algae that obscure the water when they enter surrounding streams. Similar to how silt can become suspended in the water when soil erodes and flows into rivers, streams, and the Bay.

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Exposure occurs when people have contact with a chemical, either directly or through another substance contaminated with a chemical.

Exposure to chemicals commonly used in workplaces can lead to a variety of short- and long-term health effects such as poisoning, skin rashes and disorders of the lung, kidney and liver. A quarter of all Victorian employees regularly use hazardous substances such as chemicals, flammable liquids and gases in their work.

A small chemical exposure can cause tearing eyes and burning of the eyes, nose, throat, chest and skin. It may cause headache, sweating, blurred vision, stomach aches and diarrhea. It is common for even mild symptoms from a harmful chemical to make people feel anxious. Once exposure is stopped, mild symptoms usually go away quickly. A large chemical exposure may additionally cause more serious effects such as difficulty breathing, coughing, wheezing, a faint feeling, or weakness. The worst effects from the most harmful chemicals are sudden collapse, convulsions, and possibly even death.

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The number of neutrons correctly represented is B. As has 42 neutrons.

Neutrons,  as well as  protons,  ca be described as the subatomic particles that are present  inside the nucleus of every atom and only in  hydrogen,  is where the nucleus contains only a single proton.

However the Neutrons have a neutral electric charge as well as  and  slightly more mass than positively charged protons.

It should be noted that  Arsenic (As),  has Atomic Number 33, Mass 74.922.

Mass number -Atomic number =Number of neutrons

And the Number of neutrons =74.922  - 33 = 41.9 =42

Therefore, option B is correct.

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Any substance that is a gift at the beginning of a chemical reaction a reactant

“A substance is a matter which has a specific composition and unique homes. ” every pure detail or pure compound is a substance. A substance can't be separated by way of any physical technique. The homes/composition of a natural substance is fixed.A substance is be counted which has a particular composition and unique houses. every pure element is a substance. each pure compound is a substance. Examples of materials: Iron is an element and as a result is also a substance.

A chemical substance is a shape of matter having a steady chemical composition and function homes. some references add that chemical substances can't be separated into their constituent factors with the aid of bodily separation techniques, i.e., without breaking chemical bonds.

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Answer:

pH=7.32

Explanation:

pH is a mathematical expression that represents -log base 10 of the hydronium concentration:

[tex]pH=-\log[H_3O]\\pH=-log(4.75x10^-8)\\pH=7.32[/tex]

Neutral atom generally means to atoms which don't react with any other atoms or elements.

If an atom has an equal number of electrons and protons, then it also has an equal number of negative (the electrons) and positive electric charges (the protons). As a result, the total electric charge of the atom is zero, and the atom is said to be neutral. Thus, all the elements in the periodic table are neutral atoms.

Example of neutral atom

For example a neutral sodium atom which contains 11 protons and 11 electrons. And after removing an electron from this atom we get a positively charged Na⁺ ion that has a net charge of +1. Atoms become negatively charged when it  gains extra electrons.

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Methane creates a covalent bond that is non-polar. This is due to the fact that there is hardly any distinction between the electronegativity of carbon and hydrogen.

The chemical structure of CH4 makes it nonpolar. Although the bonds between each hydrogen atom and the carbon are polar, their polarity is negated by the bond angles between them. The steric number of the carbon atom in the center, which is bonded to exactly four other atoms, is four. As a result, it has a tetrahedral molecular structure, and all of the bond angles are 90 degrees.With precisely 5 atoms joined together by covalent bonds, methane, or CH4, is a covalent molecule. This covalent connection is depicted as a Lewis structure .

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Phosphorus and chlorine form bond is covalent bond.

A covalent bond is likely to form if the difference in electronegativity between the elements is less than 1.7.

For instance, the electronegativity of phosphorus (P) is 2.1 and that of chlorine (Cl) is 3.0.

These two numbers are differentiated by 0.9. Since 0.9 is lesser than 1.7, phosphorus and chlorine form a covalent bond.

Chlorine and phosphorus are both found on the right side of the periodic table, which is where nonmetals are. As a result, a covalent bond will be formed between the two nonmetals.

So, we can say that covalent bond is between phosphorus and chlorine.

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Answer:

yes

Explanation:

yes

Answer:

B

Explanation:

Most animals change due to the environment to help them live better

As stated in the preceding statement Phosphorus and chlorine share six electrons.

The smallest elemental component of an atom, the electron has a negative charge. In a neutral atom, there are an equal amount of protons and electrons. One electron or one proton are all that the hydrogen atom has.

The negatively charged particles known as electrons revolve on the outside of the nucleus. For scientists, it might be challenging to monitor them because of how quickly they spin. The tiniest particles in an isotope, you can put 2000 of them within a proton, they are drawn to the positive ion of the neutrons.

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The volume of the sample after the reaction takes place at constant temperature and pressure would be 5.4 L.

In the reaction: [tex]N_2(g) + 2H_2(g)-- > N_2H_4(g)[/tex]

Stoichiometrically, 1 mole of [tex]N_2[/tex] reacts with 2 moles of [tex]H_2[/tex] to produce 1 mole of [tex]N_2H_4[/tex].

In reality, 0.1500 mol of  [tex]N_2[/tex] reacts with 0.3000 mol of [tex]H_2[/tex]. The equivalent amount of [tex]N_2H_4[/tex] that would be formed will be 0.1500 mol according to the mole ratios from the balanced equation of the reaction.

Now, at constant temperature and pressure:

0.1500 + 0.3000 = 0.4500 mol

0.4500 mol is equivalent to 16.2 L according to the illustration.

0.1500 mol of  [tex]N_2H_4[/tex] is produced, the equivalent mole would, therefore, be:

0.4500 mol = 16.2 L

0.1500 mol = 16.2 x 0.1500/0.4500

                  = 5.4 L

In other words, the volume of the sample after the reaction takes place at constant temperature and pressure would be 5.4 L.

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Considering the Boyle's law, the volume of the gas sample will be 997.908 mL.

Boyle's law states that the pressure of a gas in a closed container is inversely proportional to the volume of the container, when the temperature is constant: if the pressure increases, the volume decreases while if the pressure decreases, the volume increases.

Mathematically, this law expresses that if the amount of gas and the temperature remain constant, the product of the pressure by the volume always has the same value:

P×V= k

where P is the pressure, V is the volume, and k is a constant.

Analyzing an initial state 1 and a final state 2, it is fulfilled:

P₁×V₁= P₂×V₂

In this case, you know:

P₁= 1.10 atm

V₁= 694 mL

P₂= 0.765 atm

V₂= ?

Replacing in Boyle's law:

1.10 atm× 694 mL= 0.765 atm×V₂

(1.10 atm× 694 mL)÷ 0.765 atm= V₂

997.908 mL= V₂

Finally, the new volume will be 997.908 mL.

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Due to its symmetry and the fact that the pull of the two oxygen atoms on the electrons of carbon cancel each other out, carbon dioxide is a nonpolar molecule with polar bonds. Because the vector sum of the dipole moments of the two CO bonds is zero, the CO2 molecule is non-polar even if the CO bond in it is polar.

With carbon, each oxygen atom forms a double bond. Different electronegativities of carbon (C) and oxygen (O) result in unequal distribution of electrons between them. Due to the cancellation of the two bond dipole moments, there is no net molecule dipole moment. Carbon dioxide is a non-polar gas as a result.

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It turns electrical energy into KE.

This is the correct statement of how a generator works:

A generator is described as a device that converts motive power or fuel-based power into electric power for use in an external circuit.

Generators contrary to general opinion do not create electricity instead it uses the mechanical energy supplied to it to force the movement of electric charges present in the wire of its windings through an external electric circuit. This flow of electrons makes up  the output electric current supplied by the generator.

The present-day generators work on the principle of electromagnetic induction that was discovered by Michael Faraday.

Faraday realized that the above flow of current can be created by moving an electrical conductor in a magnetic field and this movement creates a voltage difference between the two ends of the conductor which causes the electric charges to flow, hence generating electric current.

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Complete question:

How does the generator work? Select the statement that describes that.

______It turns electrical energy into KE.

_____ It turns sound energy into electrical energy.

_____ It turns electrical energy into sound energy.

_____ It turns electrical energy into thermal energy.

_____ It turns KE into electrical energy.

Answer: The hot dissolved butter will form softer cookies.

Explanation:

Cinder cones are made up of layers of pebble-sized or larger cinders and layers of ash. Larger volcanic bombs and blocks may also be present.

cinder cone, also called ash cone, deposit around a volcanic vent, formed by pyroclastic rock fragments (formed by volcanic or igneous action), or cinders, which accumulate and gradually build a conical hill with a bowl-shaped crater at the top. Cinder cones develop from explosive eruptions of mafic (heavy, dark ferromagnesian) and intermediate lavas and are often found along the flanks of shield volcanoes. The outside of the cone is often inclined at about 30°, the angle of repose (the slope at which the loose cinder can stand in equilibrium). Cinder cones may be only a few tens of feet high, or they may grow to a height of several hundred meters (several thousand feet), like that of Paricutín in Mexico. Lava flows may break out of or breach the cone, or they may flow from under the cone through tunnels. Cinder cones are numerous in nearly all volcanic districts. Although they are composed of loose or only moderately consolidated cinder, many of them are surprisingly enduring features of the landscape because rain falling on them sinks into the highly permeable cinder instead of running off down their slopes to erode them.

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Francium is most reactive element in periodic table.

Properties of elements within a period vary in a predictable way from one side of the periodic table to the other. In the periodic table, each period is represented by a horizontal row. Every atom in a line has the same number of electron shells. Elements become less metallic as a result of gaining electrons and protons as they move through a period. - The number of electron shells is the same for elements in the same period.

This arrangement reflects the fact that similar features recur frequently as the atomic number increases. The characteristics of elements within a blank shift in a predictable way from one side of the periodic table to the other. Those that meet certain criteria are displayed in a column.

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