Experimental data for a 1.00 m Mgl₂ aqueous
solution indicate an actual change in the freezing
point of water of -4.78°C. Find the expected
change in the freezing point of water. Suggest a
possible reason for the discrepancy between the
experimental and expected values.

No, it is not possible to fit one mole of people into a classroom.

One mole of anything is defined as the amount of that substance that contains the same number of particles as there are atoms in exactly 12 grams of carbon-12. This number is known as Avogadro's number and is equal to approximately 6.022 x 10²³.

Assuming that one person has an average mass of 70 kilograms, the mass of one mole of people would be approximately 70 kilograms x 6.022 x 10²³, which is equal to about 4.2 x 10²⁵ kilograms.

Clearly, this is an enormous mass, far too large to fit into any classroom or even any building on Earth. Therefore, it is not possible to fit one mole of people into a classroom.

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Answer:

One mole of people is 6.02x1023 people. That’s more people than there are in the entire world which is estimated to be about 7x109 people. So clearly the answer is NO.

Explanation:

Caustic soda or lye are two other names for sodium hydroxide. It is a typical ingredient in detergents and cleansers. Sodium hydroxide is a colorless, odorless solid at ambient temperature.

Lye and caustic soda are other names for sodium hydroxide, a chemical substance with the formula NaOH. It is a whitish, solid ionic substance made up of the cations sodium (Na+) and the anions hydroxide (OH).

At normal atmospheric temps, sodium hydroxide, an extremely corrosive base and alkali, breaks down proteins and can result in serious chemical burns. It easily draws moisture and carbon dioxide from the air due to its high water solubility. It produces a string of NaOH-nH2O hydrates. From water solutions, the monohydrate NaOHH2O crystallizes between 12.3 and 61.8 °C. This monohydrate is frequently the "sodium hydroxide" sold professionally, and it may be used in published statistics instead of the anhydrous substance.

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Commercial preparation of copper(II) chloride involves chlorinating copper. When chlorine gas and copper are combined directly at red heat (300–400°C), the result is (molten) copper (II) chloride.

By reducing copper(II) ions in the presence of chloride ions, copper(I) chloride can be created. Potential techniques include boiling a solution of copper sulfate, sodium chloride, and ascorbic acid, or bubbling sulfur dioxide through an aqueous solution of copper(II) chloride.

Creating copper(I) chloride, often known as CuCl. Creating copper(I) chloride by reducing copper(II) chloride with sulfite ions when chloride ions are present is the intended result. Students should be able to: Identify and store inorganic compounds with unstable oxidation states at the conclusion of this lesson.

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The force that gravity must pull down on the car in order to break the bridge must be greater than 782 N.

Newton's third law of motion states that for every action, there is an equal and opposite reaction. This means that when an object exerts a force on another object, the second object exerts an equal and opposite force back on the first object.

In other words, if object A pushes or pulls on object B, object B will push or pull back on object A with the same force, but in the opposite direction. This law applies to all objects in the universe, whether they are stationary or in motion.

For this question, the force that the car must apply on the bridge to break must be greater than 782 N.

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To determine the number of molecules of PCI5, we need to use the following steps:

Convert the given mass of PCI5 to moles using the molar mass of PCI5.

Use Avogadro's number to convert the number of moles to molecules.

The molar mass of PCI5 can be calculated as follows:

P = 1 x 30.97 = 30.97

C = 1 x 12.01 = 12.01

I = 5 x 126.90 = 634.50

Molar mass of PCI5 = 30.97 + 12.01 + 634.50 = 677.48 g/mol

Mass to moles:

moles = mass / molar mass

moles = 77.4 g / 677.48 g/mol

moles = 0.114 moles

Moles to molecules:

One mole of any substance contains 6.022 x 10^23 particles (Avogadro's number).

Number of molecules = moles x Avogadro's number

Number of molecules = 0.114 mol x 6.022 x 10^23 mol^-1

Number of molecules = 6.87 x 10^22 molecules

Therefore, there are 6.87 x 10^22 molecules of PCI5 in 77.4g of PCI5.

(a) The hydrolysis reaction of propyl propanoate is written as CH₃CH₂COOCH₂CH₂CH₃ + H₂O → CH₃CH₂COOH + CH₃CH₂CH₂OH.

(b) The hydrolysis reaction of N, N-dimethyl propanamide is written as (CH₃)₂NC(CH₃)₂ + H₂O → CH₃CH₂COOH + (CH₃)₂NH.

The hydrolysis reaction of propyl propanoate can be represented by the following equation:

Propyl propanoate + Water → Propanoic acid + 1-Propanol

CH₃CH₂COOCH₂CH₂CH₃ + H₂O → CH₃CH₂COOH + CH₃CH₂CH₂OH

The hydrolysis reaction of N, N-dimethyl propanamide can be represented by the following equation:

N, N-dimethyl propanamide + Water → Propanoic acid + Dimethylamine

(CH₃)₂NC(CH₃)₂ + H₂O → CH₃CH₂COOH + (CH₃)₂NH

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The reaction has a 36.43% percent yield. This suggests that part of the reactants were not transformed into products and that the reaction did not proceed to its full potential.

The mole, which is denoted by the symbol "mol," is the volume of a system that has the same number of atoms as there are in 0.012 kilo grammes of carbon 12.

The chemical equation for converting [tex]O_{2}[/tex] to [tex]O_{3}[/tex] is as follows:[tex]O_{3}[/tex]

3[tex]O_{2}[/tex] ⇒ 2[tex]O_{3}[/tex]

From above we can conclude that the equation that 3 moles of [tex]O_{2}[/tex] react to create 2 moles of [tex]O_{3}[/tex].

By applying the  the mole ratio and molar mass of [tex]O_{3}[/tex],

the theoretical yield of O3 will be-

[tex]O_{3}[/tex] mol mass = 3 x O mol mass = 3 x 16.00 g/mol = 48.00 g/mol.

o find the number of moles of O2, we can use the formula:

moles = [tex]\frac{mass}{molar mass}[/tex]

moles of [tex]O_{2}[/tex] = [tex]\frac{305 g}{32.00}[/tex] g/mol = 9.53 mol

The theoretical yield of [tex]O_{3}[/tex] from the balanced equation using the following formula:

Moles of [tex]O_{3}[/tex] = [tex]\frac{2}{3}[/tex] x moles of [tex]O_{2}[/tex]

= [tex]\frac{2}{3}[/tex] x 9.53 mol = 6.35 mol

Mass of O3 = moles of [tex]O_{3}[/tex] x molar mass of [tex]O_{3}[/tex]

= 6.35 mol x 48.00 g/mol = 304.80 g

= 304.80 g.

Percent yield = ([tex]\frac{actual yield}{ theoretical yield}[/tex]) x 100%

Given that the actual yield = 111 g

Percent yield = ([tex]\frac{111 g }{304.80 g}[/tex]) x 100%

= 36.43%

Answer:

A hydrocarbon

Explanation:

Therefore, the flow rate of ammonia that should be delivered into the stream is 6.34 x 10⁶ L/s.

Concentration refers to the amount of a substance that is dissolved or present in a given volume or mass of a solution or mixture. It is usually expressed as the amount of solute per unit of solvent or solution. There are different ways to express concentration, including molarity, molality, mass percentage, volume percentage, and parts per million (ppm), among others. Concentration is an important parameter in many fields, including chemistry, biochemistry, environmental science, and engineering.

Here,

To solve this problem, we need to use the ideal gas law to calculate the number of moles of NO in the exhaust stream, and then use stoichiometry to determine how much ammonia is required to react completely with the NO. First, let's use the ideal gas law to calculate the number of moles of NO in the exhaust stream:

PV = nRT

where P is the partial pressure of NO, V is the volume of the exhaust stream, n is the number of moles of NO, R is the ideal gas constant, and T is the temperature of the exhaust stream.

We can rearrange this equation to solve for n:

n = PV/RT

Plugging in the values given in the problem, we get:

n(NO) = (21.8 torr) (335 L/s) / (0.08206 L·atm/mol·K) (955 K)

n(NO) = 972.4 mol/s

Now let's use stoichiometry to determine how much ammonia is required to react completely with the NO. According to the balanced chemical equation, 4 moles of NH₃ react with 4 moles of NO:

4NH₃(g) + 4NO(g) → 4N₂(g) + 6H₂O(g)

So the number of moles of NH₃ required is equal to the number of moles of NO, or:

n(NH₃) = n(NO) = 972.4 mol/s

However, the ammonia delivered to the stream is only 65.4% pure, so we need to calculate the actual flow rate of ammonia required to deliver this many moles of NH₃.

Let's first calculate the number of moles of ammonia that would be present in 1 L of the ammonia solution:

n(NH₃) = (65.4/100) (765 torr / 760 torr) (1 L) / (0.08206 L·atm/mol·K) (298 K)

n(NH3) = 0.0270 mol/L

Now we can use this value to calculate the flow rate of ammonia required:

Flow rate of ammonia = n(NH₃) / molarity of ammonia solution x purity of ammonia solution

Flow rate of ammonia = 972.4 mol/s / (0.0270 mol/L) / (65.4/100)

Flow rate of ammonia = 6.34 x 10⁶ L/s

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C.) Schrodinger's Quantum Mechanical Model is the electron model currently accepted by modern science. This model is based on the principles of quantum mechanics, which describe the behavior of particles at the atomic and subatomic level.

What is Electron?

An electron is a subatomic particle that carries a negative electric charge. It is one of the three fundamental particles that make up atoms, along with protons and neutrons. Electrons are much smaller than protons and neutrons, and they orbit around the nucleus of an atom. Electrons play a crucial role in chemical reactions, since they determine the chemical properties of atoms and molecules.

It represents electrons as probability clouds or orbitals, rather than as discrete particles following classical trajectories. This model has been successful in explaining the behavior of electrons in atoms and molecules, and has led to many important discoveries in modern physics and chemistry.

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The reciprocal of the square of each distance is a measure of how much the force is affected by the distance. To calculate this, take the reciprocal (1/x) of the square of each distance.

Reciprocal is an adjective that refers to a mutual exchange or interaction between two or more parties. It is often used to describe a situation in which each person or group involved in a relationship has an equal and opposite effect on the other. For example, a reciprocal trade agreement is one in which two countries agree to trade with one another without imposing tariffs or other restrictions. Reciprocal relationships can also be found in social situations, such as in friendships, where two people are mutually supportive and understanding of one another.

For example, for the first distance of 1m, the reciprocal of the square of the distance is 1/12 = 1.000.

Force (N)  Distance (m)  Force Factor  1/Distance2

0.667      1              1.000      1.000

1.000      1.5          1.500      0.444

1.333      2              2.000      0.250

The force factor is an expression of the strength of the force relative to the original force. To calculate the force factor for each force, divide it by the original force. For example, for the first force of 0.667 N, the force factor is 0.667/0.667 = 1.000.

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We must combine 25.9 mL of the benzoic acid solution with 74.1 mL of the sodium benzoate solution in order to create a 100.0 mL pH 4.00 buffer solution using 0.100 M benzoic acid and 0.180 M sodium benzoate.

With sodium benzoate and benzoic acid, we may create a pH 4.00 buffer using the Henderson-Hasselbalch equation:

pH equals pKa plus log([A-]/[HA])

Rearranging the equation to find the ratio of [A-]/[HA] will enable us to create a buffer with a pH of 4.00:

[A-]/[HA] = 10^(pH - pKa) (pH - pKa)

[A-]/[HA] = 0.630

0.630 * 0.100 M benzoic acid * V2 = 0.180 M sodium benzoate

V1 + V2 = 100.0 mL

One variable can be solved for in terms of another:

V1 = 0.350 V2

then enter the following expression as V1 in the second equation:

1.350 V2 = 100.0 mL

V2 = 74.1 mL

V1 = 0.350 * 74.1 mL = 25.9 mL

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To determine the minimum mass of hexane that could be left over by the chemical reaction, we need to first balance the chemical equation:

2 C₆H₁₄ + 19 O₂ → 12 CO₂ + 14 H₂O

From the balanced equation, we can see that 2 moles of hexane react with 19 moles of oxygen to produce 12 moles of carbon dioxide and 14 moles of water.

Next, we need to calculate the number of moles of hexane and oxygen in the given masses:

Number of moles of hexane = 46. g / 86.18 g/mol = 0.533 mol

Number of moles of oxygen = 66.1 g / 32.00 g/mol = 2.066 mol

To determine the limiting reactant, we need to compare the number of moles of each reactant to their respective stoichiometric coefficients. The stoichiometric coefficient for hexane is 2, and the coefficient for oxygen is 19/2 = 9.5.

Since the number of moles of oxygen is greater than the number of moles required for the reaction (9.5 times the number of moles of hexane), oxygen is in excess and hexane is the limiting reactant.

Using the balanced equation, we can calculate the number of moles of carbon dioxide and water produced:

Number of moles of carbon dioxide = 0.533 mol × (12 mol CO2 / 2 mol hexane) = 3.198 mol CO₂

Number of moles of water = 0.533 mol × (14 mol H2O / 2 mol hexane) = 3.731 mol H₂O

Finally, we can use the stoichiometry of the balanced equation to calculate the number of moles of hexane that react completely:

Number of moles of hexane that react = 0.533 mol

Therefore, the minimum mass of hexane that could be left over is:

Mass of hexane left over = (0.533 mol) × (86.18 g/mol) = 45.9 g

Rounding to three significant digits, the minimum mass of hexane that could be left over is 45.9 g.

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Answer:

O a. medium of turpentine

34.57 grams of Li3PO4 are required to react 44 g of H2SO4, in this case.

H2SO4 mass divided by its molar mass yields the number of moles of H2SO4: 44 g divided by 98.07 g/mol, or 0.4484 mol.

Li3PO4 moles equal (2/3) x H2SO4 moles equal (2/3) x 0.4484 mol = 0.2989 mol.

Using its molar mass, we can finally get the mass of Li3PO4 needed in grams:

Li3PO4 necessary mass equals number of moles times the molar mass of Li3PO4 (0.2989 mol times 115.78 g/mol equals 34.57 g).

As a result, 44 g of H2SO4 must be utilized in the reaction along with 34.57 g of Li3PO4.

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The equation q = mcT, where m is the mass of the sample, c is the specific heat, and T is the temperature change, can be used to determine how much heat is gained or lost by a sample (q).

A process that absorbs energy from its surroundings, typically in the form of heat, is said to be endothermic. The melting of an ice cube is one illustration.

The amount of energy needed to melt 1 g of ice at 0 °C is 334 J, often known as the latent heat of melting. Liquid water has 334 J g-1 greater energy at absolute zero.

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There are approximately 6.13 grams of O2 in the 14.0 L balloon at 0.25 atm and 73⁰C.

First we can use the Ideal Gas Law equation:

PV = nRT

Where

First, we need to convert the temperature from Celsius to Kelvin:

T = 73⁰C + 273.15 = 346.15 K

Next, we can solve for the number of moles:

n = (PV) / (RT)

n = (0.25 atm × 14.0 L) / (0.0821 L·atm/mol·K × 346.15 K)

n = 0.1915 mol

Finally, we can calculate the mass of O2 using the molar mass of O2, which is 32.00 g/mol:

mass = n × molar mass

mass = 0.1915 mol × 32.00 g/mol

mass = 6.13 g

Therefore, there are approximately 6.13 grams of O2 in the 14.0 L balloon at 0.25 atm and 73⁰C.

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Answer:

The answer is Calcium bromide

An οxygen atοm has 8 prοtοns and 8 neutrοns. It alsο has 8 electrοns.

The number οf prοtοns in an atοm is equal tο the atοmic number, which is 8 fοr an οxygen atοm. Therefοre, the number οf electrοns must equal the number οf prοtοns, which is 8.

An atοm is the smallest unit οf matter that still retains the prοperties οf an element. Atοms are cοmpοsed οf a nucleus surrοunded by a clοud οf negatively charged electrοns. The nucleus cοntains pοsitively charged prοtοns and electrically neutral neutrοns.

The atοmic number is the number οf prοtοns in the nucleus οf an atοm. It is used tο identify an element, as each element has a unique atοmic number. Fοr example, the atοmic number οf οxygen is 8, as οxygen atοms cοntain 8 prοtοns in their nucleus.

Electrοns are negatively charged particles that οrbit the nucleus οf an atοm. Electrοns determine the chemical prοperties οf an atοm, as they fοrm bοnds with οther atοms. The number οf electrοns in an atοm is equal tο the number οf prοtοns, as atοms must have a neutral charge.

An οxygen atοm has 8 prοtοns, 8 neutrοns, and 8 electrοns. The atοmic number οf οxygen is 8, which is equal tο the number οf prοtοns, and the number οf electrοns is equal tο the number οf prοtοns.

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Answer:

Carbon is found in so many different compounds due to its unique ability to form four covalent bonds with other atoms, including other carbon atoms. This means that carbon can bond with a wide variety of elements, including hydrogen, oxygen, nitrogen, sulfur, and many others, allowing it to form an enormous number of different compounds.

Furthermore, the strength of carbon-carbon bonds and carbon-heteroatom bonds allows for the formation of long chains and rings of carbon atoms, which can lead to the formation of many complex and diverse molecules, including those found in living organisms. The ability of carbon to form such a wide variety of bonds and structures makes it an extremely versatile and important element in chemistry and biology.

Explanation:

The Gibbs free energy at 298 K for the given reaction is 130.822 KJ

The Gibbs free energy for a given reaction is given by the following formula:

ΔG = ΔH – TΔS

Where

With the above formula, we can determine the Gibbs free energy for the reaction in the above question as follow:

ΔG = ΔH - TΔS

ΔG = 178.8 - (298 × 0.161)

ΔG = 178.8 - 47.978

ΔG = 130.822 KJ

Thus, the Gibbs free energy is 130.822 KJ

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7.19 is pKnet for the net reaction in which water plus dissolved carbon dioxide form hydrogen ions plus bicarbonate ions

The balanced reaction would be: H+ + HCO₃- ⇌ H₂CO₃

The equilibrium constant for the reaction is:

Keq = [H₂CO₃]/[H+][HCO₃-] = 10^(pKnet) = 7.94 × 10⁻⁷

Using the equilibrium constant, we can set up an expression for x:

Keq = [H₂CO₃]/[H+][HCO₃-] = x/[(2.48 × 10⁻² - x)(1.8 × 10⁻²)]

x = 6.43 × 10 ⁻⁸ M

Therefore, the final concentration of H+ is 6.43 × 10⁻⁸ M, and the pH is:

pH = -log[H+] = -log(6.43 × 10⁻⁸) = 7.19

So the pH decreases from the average value of 7.4 to 7.19

The acidity or basicity of a solution is measured by its pH. It is the concentration of hydrogen ions in the solution as a negative logarithm (base 10) The pH scale ranges from 0 to 14, with 0 representing the most acidic condition, 7 representing neutral conditions, and 14 representing the most basic.

The total amount of dissolved inorganic carbon in a solution, including bicarbonate ions and carbon dioxide , is referred to as the carbonate pool. Blood plasma contains the carbonate pool, which serves as a buffer and contributes to pH stability in biological systems.

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The pH of the resulting solution is approximately 1.96.

To solve this problem, we need to calculate the concentration of the final solution after the addition of NaOH and HCl, and then use this concentration to calculate the pH of the solution.

First, let's calculate the number of moles of NaOH and HCl that are added to the solution:

moles of NaOH = volume of NaOH x concentration of NaOH

moles of NaOH = 5.00 mL x (0.100 mol/L) / 1000 mL/L

moles of NaOH = 0.0005 mol

moles of HCl = volume of HCl x concentration of HCl

moles of HCl = 10.00 mL x (0.100 mol/L) / 1000 mL/L

moles of HCl = 0.001 mol

Next, let's determine the number of moles of NaOH and HCl that react with each other:

Since NaOH and HCl react in a 1:1 ratio, the number of moles of NaOH that react with HCl is equal to the number of moles of HCl, which is 0.001 mol.

Since we can't have negative moles of a substance, we know that all of the NaOH has reacted with the HCl. Therefore, the number of moles of NaOH in the final solution is zero, and the number of moles of HCl is equal to the original number of moles of HCl added to the solution, which is 0.001 mol.

Now, let's calculate the concentration of the final solution:

total volume of the solution = volume of NaOH + volume of water + volume of HCl

total volume of the solution = 5.00 mL + 75.00 mL + 10.00 mL

total volume of the solution = 90.00 mL

concentration of the final solution = moles of HCl / total volume of the solution

concentration of the final solution = 0.001 mol / (90.00 mL / 1000 mL/L)

concentration of the final solution = 0.0111 mol/L

Finally, let's calculate the pH of the final solution using the formula for the pH of an acidic solution:

pH = -log[H+]

[H+] = concentration of H+ ions in the solution

[H+] = concentration of HCl

pH = -log(0.0111)

pH = 1.96

Therefore, the pH of the resulting solution is approximately 1.96 after calculating the concentration of final solution.

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Answer:

The shift often happens when heat is applied or removed at a specific temperature

Explanation:

PLEASE MARK ME BRANLY TY HAVE A GREAT DAY!

Count the number of oxygen atoms on both sides of the equation and compare them. The number of oxygen atoms should be equal on both sides of a balanced equation.

The chemical substance oxygen has a number in the atomic structure of 8. (it has eight protons in its nucleus). At common temperatures and pressures, oxygen turns into the chemical substance (O2) of two atoms, which is a colorless gas.

Three oxygen molecules (O3) combine to form the odorless, colorless gas known as ozone, that occurs naturally in the atmosphere. Both the higher atmosphere of the Earth, known as the stratosphere, and the lower atmosphere, known as the troposphere, can contain it.

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D. Helium atoms are created when hydrogen atoms unite.

Nuclear fusion is the process in which two or more atom nuclei join together, or "fuse," to form a single heavier nucleus. This process is what powers the sun and other stars, and it is the same process that is being researched for potential use as an energy source on Earth. In the sun, the process of nuclear fusion involves the combining of hydrogen atoms to make helium atoms.When two or more atomic nuclei join, one or more new atomic nuclei and subatomic particles are created. This reaction is known as nuclear fusion. Energy is released or absorbed depending on how much mass the reactants and products have in common.

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complete question:Which of the following describes the process of nuclear fusion, as it occurs inside our sun?

A Hydrogen and oxygen atoms combine to make water molecules.

B Helium atoms split apart to form hydrogen atoms.

C Water molecules break apart into hydrogen and oxygen atoms.

D Hydrogen atoms combine to make helium atoms.

The limiting reactant is CH4. This is because the number of moles of CH4 is 4.44mol, while the number of moles of water is 0.86mol. The number of moles of hydrogen produced from the reaction is 8.88mol.

Hydrogen is a chemical element with the symbol H and atomic number 1. It is the most abundant element in the universe, making up about 75% of the universe's elemental mass. Hydrogen is a colorless, odorless, and tasteless gas, which is the most basic and simplest of all elements. It is a highly flammable, light, and combustible gas and burns with a pale blue flame. Hydrogen is a component of water, which is composed of two atoms of hydrogen and one atom of oxygen. In addition, it is found in many organic compounds and is used in the production of ammonia, methanol, and hydrochloric acid

This means that there are not enough moles of water to completely react with the CH4. Therefore, the limiting reactant is CH4.

The number of liters of hydrogen produced from the reaction of 80.0 g of CH4 and 16.3 g of water is 16.3 L. This is because the number of moles of hydrogen produced is 8.88mol, and at STP the volume of 1mol of a gas is 22.4L. Therefore, the volume of 8.88mol of hydrogen is 8.88 x 22.4L = 197.3L. Since the total volume of gas produced is 197.3L and 16.3g of water was used in the reaction, the amount of hydrogen produced is 16.3L.

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