Gas Laws Chemistry

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

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

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

A sample of He gas (3.0 L) at 5.6 atm and 25ºC was combined with 4.5 L of Ne gas at 3.6 atm and 25ºC at constant temperature in a 9.0 L flask.

The total final pressure in the flask is ___ atm. Assume the initial pressure in the flask was 0.0 atm.

• 24 atm

• 2.6 atm

• 9.2 atm

• 1.0 atm

• 3.7 atm

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

Which law?

• Charles 

• Boyle

• Hunsecker

• Newton

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

A 2.00-liter sample of nitrogen gas at 27° C and 600. millimeters of mercury is heated until it occupies a volume of 5.00 liters. If the pressure remains unchanged, the final temperature of the gas is

• 68^o C

• 120^o C

• 477^o C

• 677^o C

The system shown above is at equilibrium at 28 °C. At this temperature, the vapor pressure of water is 28 millimeters of mercury. The partial pressure of O2(g) in the system is

• 28 mm Hg

• 56 mm Hg

• 133 mm Hg

• 161 mm Hg

According to kinetic molecular theory, in which of the following gases will the root mean square speed of the molecules be the highest at 200ºC?

• SF₆

• H₂O

• HCl

• Cl₂

• None, the molecules of all gases have the same root mean square speed at any given temperature.