Chem Honors Gas Laws Practice - pgs 60-61

In the stoppered tubes, labeled A through D, each contain a different gas. When the tubes are unstopped at the same time and under the same conditions of temperature and pressure, from which tube will gas diffuse at the fastest rate?

• A

• B

• C

• D

The table attached lists four gases and their molecular mass. Which gas diffuses at the slowest rate of STP?

• A

• B

• C

• D

A mixture of gases has a total pressure of 200 kPa. The mixture contains 8 moles of nitrogen gas and 2 moles of oxygen gas. What pressure is exerted by the oxygen gas molecules?

• 400 kPa

• 20 kPa

• 40 kPa

• 200 kPa

A sample of oxygen gas is sealed in container X. A sample of hydrogen gas is sealed in container Z. Both samples have the same volume, temperature, and pressure. Which statement is true?

• Container X contains fewer gas molecules than container Z.

• Containers X and Z both contain the same number of gas molecules.

• Container X contains more gas molecules than container Z.

• Containers X and Z both contain the same mass of gas.

The table below shows date for the temperature, pressure, and volume of four gas samples. Which two gas samples have the same total number of molecules?

• A and C

• B and D

• A and B

• B and C

A sample of gas occupies a volume of 50.0 mL in a cylinder with a movable piston. The pressure of the sample is 0.90 atmosphere and the temperature is 298 K. What is the volume of the sample at STP?

• 41 mL

• 49 mL

• 51 mL

• 55 mL

The table shows mass and volume data for four samples of substance at 298 K and 1 atmosphere. Which two samples could consist of the same substance?

• A and B

• B and C

• C and D

• A and C

Tags

NGSS.HS-PS1-3

Which graph best represents the pressure-volume relationship for an ideal gas at constant temperature?

• 
• 
• 
• 

The diagram represents a gas confined in a cylinder fitted with a moveable piston. As the piston moves towards point A at constant temperature, which relationship involving pressure (P) and volume (V) is correct?

• P x V = k

• P/V = k

• P + V = k

• P - V = k