Question 1

A scuba diver uses a tank containing 12.0 L of air at 200 atm. If the air is released at the surface where the pressure is 1.0 atm and temperature remains constant, what volume will the air occupy?

Accepted Answer

$$2400\ \mathrm{L}$$

Question 2

Which of the following statements best describes the relationship between pressure and volume for a gas at constant temperature?

Accepted Answer

Pressure and volume are inversely related, as described by Boyle's Law.

Question 3

A medical oxygen tank contains $$3.0\ \mathrm{mol} of$$ $$O_2 at$$ $$4.0\ \mathrm{atm}$$ and $$300\ \mathrm{K}. $$What is the volume of the tank? $$(R = 0.0821\ \mathrm{L\cdot atm\cdot $$mol^{-1}$$\cdot K$$^{-1}$$})$$

Accepted Answer

$$18.45\ \mathrm{L}$$

Question 4

Which law explains why a hot air balloon rises when the air inside is heated?

Accepted Answer

Charles's Law

Question 5

A mixture contains gases at partial pressures of $$200\ \mathrm{kPa}$$, $$400\ \mathrm{kPa}$$, and $$600\ \mathrm{kPa}. $$What is the total pressure according to Dalton's Law?

Accepted Answer

$$1200\ \mathrm{kPa}$$

Question 6

A sample of gas at $$1.0\ \mathrm{atm}$$ and $$273\ \mathrm{K}$$ occupies $$22.4\ \mathrm{L}. If $$the temperature is increased to $$546\ \mathrm{K} at $$constant pressure, what is the new volume?

Accepted Answer

$$44.8\ \mathrm{L}$$

Question 7

Which equation expresses the Ideal Gas Law?

Accepted Answer

$$PV = nRT$$

Question 8

A hospital stores $$5.0\ \mathrm{L} of$$ $$O_2 at$$ $$1.0\ \mathrm{atm}$$ and releases it into a chamber at $$0.5\ \mathrm{atm} at $$constant temperature. What is the final volume?

Accepted Answer

$$10.0\ \mathrm{L}$$

Question 9

Which of the following is a postulate of the Kinetic Molecular Theory?

Accepted Answer

Gas particles are in constant, random motion.

Question 10

A reaction $$2H_2 + O_2$ \rightarrow 2H_2O$$ occurs in a sealed container. What is the volume ratio of $$H_2 to$$ $$O_2$$ consumed?

Accepted Answer

$$2:1$$

Question 11

If the pressure of a gas is doubled at constant temperature, what happens to its volume?

Accepted Answer

It is halved.

Question 12

Which variable must be held constant for Boyle's Law to apply?

Accepted Answer

Temperature

Question 13

A gas sample at $$300\ \mathrm{K}$$ and $$2.0\ \mathrm{atm}$$ occupies $$5.0\ \mathrm{L}. $$What will its volume be at $$400\ \mathrm{K}$$ and $$2.0\ \mathrm{atm}$$?

Accepted Answer

$$6.67\ \mathrm{L}$$

Question 14

Which law states that equal volumes of gases at the same temperature and pressure contain equal numbers of molecules?

Accepted Answer

Avogadro's Law

Question 15

A sample of $$0.50\ \mathrm{mol} of $$gas at $$300\ \mathrm{K}$$ exerts a pressure of $$4.92\ \mathrm{atm}. $$What is its volume? $$(R = 0.0821\ \mathrm{L\cdot atm\cdot $$mol^{-1}$$\cdot K$$^{-1}$$})$$

Accepted Answer

$$2.5\ \mathrm{L}$$

Question 16

Which law combines Boyle's, Charles's, and Gay-Lussac's relationships?

Accepted Answer

Combined Gas Law

Question 17

A weather balloon contains $$40.0\ \mathrm{L} of $$helium at $$15^\circ\mathrm{C}. If $$the temperature rises to $$42^\circ\mathrm{C} at $$constant pressure, what is the new volume?

Accepted Answer

$$44.0\ \mathrm{L}$$

Question 18

Which of the following best describes a gas?

Accepted Answer

It takes the shape and volume of its container.

Question 19

If $$0.60\ \mathrm{mol} of $$gas occupies $$6.0\ \mathrm{L} at$$ $$298\ \mathrm{K}$$ and $$1.0\ \mathrm{atm}$$, what is the value of $$R$$?

Accepted Answer

$$0.0821\ \mathrm{L\cdot atm\cdot $$mol^{-1}$$\cdot K$$^{-1}$$}$$

Gas Laws and Stoichiometry: Study Notes for General Chemistry

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