AP Chemistry Gas Laws

A sample of a gas (5.0 mol) at 1.0 atm is expanded at constant temperature from 10.0 L to 15.0 L. The final pressure is ___ atm.

• 1.5 atm

• 15 atm

• 0.67 atm

• 3.3 atm

• 7.5 atm

A sample of He gas (2.35 mol) occupies 57.9 L at 300.0 K and 1.00 atm. The volume of this sample is ___L at 423 K and 1.00 atm.

• 0.709 L

• 57.9 L

• 41.1 L

• 81.6 L

• 1.41 L

Use the following reaction (balance it): calcium sulfite reacts with excess hydrochloric acid to produce water vapor, sulfur dioxide gas and calcium chloride. What volume (in mL) of sulfur dioxide can be produced by 3.82 g of calcium sulfite when the final pressure of SO₂ is 827 torr at 44ºC?

• 1.39 x 10^-4 mL

• 0.106 mL

• 1.00 x 10^-3 mL

• 761 mL

• 578 mL

The pressure in a 12.2 L vessel that contains 2.34 g of carbon dioxide, 1.73 g of sulfur dioxide and 3.33 g of argon; all at 42ºC is ____ mmHg.

• 116 mmHg

• 395 mmHg

• 134 mmHg

• 263 mmHg

• 0.347 mmHg

Gas inside a balloon originally had a volume of 3.12 L. Ernesto decides to sit on the balloon and compresses it to a final volume of 0.12 L and a final pressure of 3.14 atm. What was the original pressure?

• 2.29 atm

• 0.12 atm

• 8.28 atm

If the temperature of a gas increase, the pressure...

• Decreases

• Increases

• Does not change

Tags

NGSS.MS-PS1-4

Which law?

• Charles 

• Boyle

• Hunsecker

• Newton

Use the following equation (balance it): NaH + H₂O --> NaOH + H₂

A sample of NaH weighing ___ g will produce 982 mL of hydrogen gas at 28ºC and 765 torr, when the hydrogen is collected over water. The vapor pressure of water at this temperature is 28 torr.

• 0.960 g

• 925 g

• 0.0388 g

• 2.93 g

• 0.926 g

SO₂ (5.0 g) and CO₂ (5.0 g) are placed in a 750 mL container at 50.0ºC. The partial pressure of SO₂ in the container is ____ atm.

• 1.60 atm

• 2.76 atm

• 4.02 atm

• 0.192 atm

• 6.78 atm

In an experiment 201 mL of hydrogen is collected over water at 27ºC at a total barometric pressure of 733 torr. The vapor pressure of water at 28ºC is 26.7 torr. What is the partial pressure of the dry hydrogen gas in atm?

• 0.929

• 760

• 706

• 1.00

• 0.964

Tags

NGSS.HS-PS3-4