Question 1

Which of the following statements best describes the function of a barometer?

Accepted Answer

It measures the pressure exerted by atmospheric gases.

Question 2

A pressure of 49 torr is equivalent to which of the following values in atmospheres?

Accepted Answer

$$0.064$$ atm

Question 3

Which gas law explains why squeezing a balloon decreases its volume?

Accepted Answer

Boyle's Law

Question 4

A sample of gas at $$15^	ext{o}C$$ and $$1$$ atm has a volume of $$2.58 L. $$What volume will this gas occupy at $$38^	ext{o}C$$ and $$1$$ atm?

Accepted Answer

$$2.98 L$$

Question 5

Which of the following is the correct value for the universal gas constant $$R$$ when using pressure in atm, volume in liters, and temperature in Kelvin?

Accepted Answer

$$0.0821 L$$·atm/(mol·K)

Question 6

If the pressure of a gas is doubled while the temperature remains constant, what happens to the volume according to Boyle's Law?

Accepted Answer

The volume is halved.

Question 7

A sample of hydrogen gas occupies $$8.56 L at$$ $$0^	ext{o}C$$ and $$1.58$$ atm. How many moles of hydrogen are present?

Accepted Answer

$$0.499$$ mol

Question 8

Which of the following best describes Avogadro's Law?

Accepted Answer

At constant temperature and pressure, the volume of a gas is directly proportional to the number of moles.

Question 9

A sample of methane gas with a volume of $$38 mL at$$ $$5^	ext{o}C is $$heated to $$86^	ext{o}C at $$constant pressure. What is its new volume?

Accepted Answer

$$49 mL$$

Question 10

Which of the following is NOT a unit of pressure commonly used in chemistry?

Accepted Answer

mol

Question 11

Which of the following statements about atmospheric pressure is correct?

Accepted Answer

Atmospheric pressure is the force exerted by gas molecules on the surface of the Earth.

Question 12

A sample of nitrogen gas has a pressure of $$699.2$$ torr at $$315 K $$and a volume of $$0.845$$ mol. What is the volume in liters?

Accepted Answer

$$23.8 L$$

Question 13

Which of the following is a correct application of Charles' Law?

Accepted Answer

Increasing the temperature of a gas at constant pressure increases its volume.

Question 14

Which of the following is the correct relationship for the combined gas law?

Accepted Answer

$$\frac{P_1$ V_1$}{T_1$} = \frac{P_2$ V_2$}{T_2$}$$

Question 15

If you have $$0.50$$ mol of $$O_2$$ gas at $$1$$ atm and $$25^	ext{o}C$$, and all of it is converted to $$O_3 at $$the same temperature and pressure, what is the volume of the ozone produced?

Accepted Answer

$$12.2 L$$

Question 16

Which of the following is true about the relationship between temperature and kinetic energy of a gas?

Accepted Answer

As temperature increases, the average kinetic energy of gas molecules increases.

Question 17

Which of the following is the correct conversion factor between mm Hg and atm?

Accepted Answer

$$760 mm Hg = 1$ atm

Question 18

A gas sample is heated from $$273 K to$$ $$546 K at $$constant pressure. What happens to its volume?

Accepted Answer

The volume doubles.

Question 19

Which of the following is NOT a postulate of the kinetic molecular theory (KMT)?

Accepted Answer

Gas particles exert attractive forces on each other.

Question 20

Which of the following scenarios best illustrates Avogadro's Law?

Accepted Answer

Adding more gas to a balloon at constant temperature and pressure causes the balloon to expand.

Gas Laws and Properties of Gases: General Chemistry Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards