CHEMISTRY HIGH SCHOOL

A cylinder with a movable piston contains a sample of gas having a volume of 6.0 liters at 293 K and 1.0 atmosphere. What is the volume of the sample after the gas is heated to 303 K, while the pressure is held at 1.0 atmosphere?(1) 9.0 L (3) 5.8 L
(2) 6.2 L (4) 4.0 L

Answers

Answer 1
Answer:

The volume of sample when the gas is heated to 303 K is  \boxed{{\text{(2)6}}{\text{.2 L}}}

Further explanation:

Charles’s law:

Charles’s work showed that at constant pressure, the volume-temperature relationship for a fixed amount of gas is linear. In other words, Charles’s law can be stated that at constant pressure, the volume occupied by a fixed amount of a gas is directly proportional to its absolute temperature (Kelvin). This relationship is known as Charles’s law.

The mathematical representation of Charles’s law is,

{\mathbf{V}}\propto{\mathbf{T}}                                                                           [P and n are constant]

Where,

⦁ V is volume occupied by the fixed quantity of gas.

⦁ T is the temperature of a gas.

⦁ P is the pressure of a gas.

⦁ n denotes the number of moles of gas.

The relationship can also be expressed as,

\frac{{\text{V}}}{{\text{T}}} = {\text{constant}}                                                  [P and n are constant]

Or it can also be expressed as follows:

\frac{{{{\text{V}}_{\text{1}}}}}{{{{\text{T}}_{\text{1}}}}} = \frac{{{{\text{V}}_{\text{2}}}}}{{{{\text{T}}_{\text{2}}}}}                                                          …… (1)

Here,

{{\text{V}}_1}  is the initial volume of gas.

{{\text{V}}_2}  is the final volume of gas.

{{\text{T}}_1}  is the initial temperature of the gas.

{{\text{T}}_2}  is the final temperature of the gas.

Rearrange equation (1) to calculate {{\text{V}}_2} .

{{\text{V}}_{\text{2}}} = \frac{{{{\text{V}}_{\text{1}}}{{\text{T}}_{\text{2}}}}}{{{{\text{T}}_{\text{1}}}}}                                                                  …… (2)

The value of {{\text{V}}_1}  is 6 L.

The value of {{\text{T}}_1}  is 293 K.

The value of {{\text{T}}_2}  is 303 K.

Substitute these values in equation (2).

\begin{aligned}{{\text{V}}_{\text{2}}}&=\frac{{\left({{\text{6 L}}}\right)\left( {{\text{303 K}}}\right)}}{{\left( {{\text{293 K}}}\right)}}\n&={\text{6}}{\text{.20477 L}}\n&\approx{\mathbf{6}}{\mathbf{.2 L}}\n\end{aligned}

So option (2) is the correct answer.

Learn more:

1. Law of conservation of matter states: brainly.com/question/2190120

2. Calculation of volume of gas: brainly.com/question/3636135

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Ideal gas equation

Keywords: Charles’s law, volume, temperature, pressure, volume temperature relationship, absolute temperature, constant pressure, relationship, V directly proportional to T, ideal gas, ideal gas equation number of moles, moles, P, n, V, T, volume of gas, 6.2 L, 303 K, 293 K, 6 L.
Answer 2
Answer:

The volume of the sample after the gas is heated to 303 K is 6.2 L

The correct answer to the question is Option (2) 6.2 L

From the question given above, the following data were obtained:

Initial volume (V₁) = 6 L

Initial temperature (T₁) = 293 K

Final temperature (T₂) = 303 K

Pressure = constant

Final volume (V₂) =?

Using the Charles' law equation, we can obtain the final volume of the gas as follow:

(V_(1))/(T_(1)) = (V_(2))/(T_(2))\n\n(6)/(293) = (V_(2))/(303)\n\n

Cross multiply

293 × V₂ = 6 × 303

293 × V₂ = 1818

Divide both side by 293

V_(2) = (1818)/(293)\n\n

V₂ = 6.2 L

Therefore, the volume of the sample after the gas is heated to 303 K is 6.2 L

The correct answer to the question is Option (2) 6.2 L

Learn more: brainly.com/question/16927784

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The balanced chemical equation for the reaction between PCl5 and water is given below. If 3.45 moles of HCl are produced, how many moles of water reacted?PCl5 + 4H2O -> H3PO4 + 5HCl

Answers

Final answer:

The reaction PCl5 + 4H2O -> H3PO4 + 5HCl involves 5 moles of HCl and 4 moles of water. Thus, for every mole of HCl produced, 0.8 moles of water is consumed. Hence, in this scenario, 2.76 moles of water would have been consumed to produce 3.45 moles of HCl.

Explanation:

In the balanced equation, PCl5 + 4H2O -> H3PO4 + 5HCl, you notice that 4 moles of water react with PCl5 to produce 5 moles of HCl. This means for every mole of HCl produced, 0.8 moles of water would have been consumed (4 moles / 5 moles).

So, if the reaction results in 3.45 moles of HCl, we can calculate the number of moles of water that reacted by multiplying the moles of HCl by 0.8. This gives us 2.76 moles of water.

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Final answer:

By creating a proportion based on the balanced chemical equation, it is determined that 2.76 moles of water reacted with PCl5 to produce 3.45 moles of HCl.

Explanation:

To determine how many moles of water reacted if 3.45 moles of HCl are produced, we refer to the balanced chemical equation:

PCl5 + 4H2O → H3PO4 + 5HCl

According to the equation, for every 5 moles of HCl produced, 4 moles of water are needed. Therefore, you can set up a proportion to calculate the moles of water:

  • (Moles of HCl produced / Moles of HCl in the equation) = (Moles of H2O reacted / Moles of H2O in the equation)
  • (3.45 moles HCl / 5 moles HCl) = (x moles H2O / 4 moles H2O)

Solving for x gives you the number of moles of water that reacted:

x = (3.45 moles HCl × 4 moles H2O) / 5

Thus, x = 2.76 moles of H2O.

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Which molecule has a nonpolar covalent bond?

Answers

Nonpolar covalent bonds are chemical bonds where two atoms share a pair of electrons with each other and the electronegativities of the two atoms are equal. An example is methane. It has four carbon-hydrogen single covalent bonds. These bonds are nonpolar because the electrons are shared equally.

Final answer:

Nonpolar covalent bonds form when two atoms of the same element or different elements share electrons equally, resulting in a balanced charge distribution. Examples include Methane (CH4) and molecular oxygen (O2). Another case is the CO2 molecule, which is nonpolar because its polar bond moments cancel out.

Explanation:

This leads to a balanced distribution of charges in the molecule, making it nonpolar. Methane, for instance, consists of a carbon atom that shares four electrons equally with four hydrogen atoms, resulting in a bond where the difference in electronegativity between the carbon and hydrogen atoms is minimal.

Another case is CO₂ where the molecule, though consisting of polar bonds, is overall nonpolar because the geometric layout of the molecule allows for the bond moments to cancel each other out, hence no region of the molecule is more positive or negative than any other. Considering the geometry of the molecule is essential when determining the polarity of a molecule with more than one bond.

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Answers

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Answers

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Answers

Answer: Option (b) is the correct answer.

Explanation:

Insulator are the substances which do not conduct electricity. It is known that metals are good conductors of electricity. Whereas non-metals do not conduct electricity.

Out of the given options, silver, and calcium is a metal that means they are good conductors of electricity and are not insulators.

On the other hand, silicon is a metalloid, that is, it shows properties of both metals and non-metals. Hence, it will also show conductivity.

Phosphorus is a non-metal and therefore, it does not conduct electricity. As a result, out f the given options it will act as the best insulator.

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The statement "matter can be neither created nor destroyed by chemical means, but it can be changed from one form to another" is the chemical law ofa. conservation of energy.
b. conservation of matter.
c. atomic disintegration.
d. definite proportions.

Answers

your answer is b. conservation of matter.

i just took the test

Answer: b. Conservation of matter.

Explanation:

Law of conservation of matter states that matter can neither be created nor destroyed by means of chemical reaction but can be changed from one form to another.

It means that the amount of matter remains the same after a chemical change.

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