AP Gases

What is the pressure in a container that has 3 atm H_2, 2 atm of N₂ and 5 atm of F₂?

• 2 atm

• 3 atm

• 5 atm

• 10 atm

Find the density of neon gas at 0.725 atm and 25°C [M_m =20.18]

• 0.35

• 0.47

• 0.60

• 0.79

An important idea of the kinetic theory is that particles of matter 

• are in constant motion
• have different shapes
• have different colors
• are always fluids

The conditions under which real gases most resemble ideal gases are 

• low pressure & high temperature
• low pressure & low temperature
• high pressure & high temperature
• high pressure & low temperature

A gas sample is held at constant pressure. The gas occupies 3.62 L of volume when the temperature is 21.6°C. Determine the temperature at which the volume of the gas is 3.42 L.

• 312K

• 278K

• 20.4K

• 295K

• 552K

A sealed vessel contains 0.200 mol of oxygen gas, 0.100 mol of nitrogen gas, and 0.200 mol of argon gas. The total pressure of the gas mixture is 5.00 atm. The partial pressure of the argon is

• 0.200 atm

• 0.500 atm

• 1.00 atm

• 2.00 atm

The reaction between NO_(g) and O_2(g) to produce NO_2(g) in a rigid reaction vessel is represented in the diagram above. The pressure inside the container is recorded using a pressure gauge. Which of the following statements correctly predicts the change in pressure as the reaction goes to completion at constant temperature, and provides the correct explanation?

• The pressure will increase because the product molecules have a greater mass than either of the reactant molecules.

• The pressure will decrease because there are fewer molecules of product than of reactants.

• The pressure will not change because the total mass of the product molecules is the same as the total mass of the reactant molecules.

The volume of a sample of helium is 4.5 mL at 20.0°C and 203.0 kPa. What will its volume be in the figure?

• 2.25 mL

• 3.78 mL

• 4.34 mL

• 6.85 mL

At an ocean depth of 10.0 m, a diver’s lung capacity is 2.40 L. The air temperature is 32.0°C and the pressure is 101.30 kPa. What is the volume of the diver’s lungs at the same depth, at a temperature of 21.0°C and a pressure of 141.20 kPa?

• 1.12 L

• 1.66 L

• 1.78 L

• 4.86 L

What volume does .0685 mol of gas occupy at STP?

• 0.3707 mol

• 0.7515 mol

• 1.53 L

• 3.06 L