Test: 4th quarter review

If the temperature of a gas remains constant, then the pressure of the gas will increase if the

• mass of the gas molecules decreases.

• diffusion of the gas molecules increases.

• size of the container is decreased.

• number of gas molecules in the container is decreased.

Equal volumes of ideal gases at the same temperature and pressure contain equal numbers of

• protons.

• ions.

• particles.

• electrons.

Suppose that two unlike gases of different mass are injected into opposite ends of a long tube at the same time and allowed to diffuse toward the center. They should begin to mix

• at the end that held the heavier gas.

• between the end where the heavier gas entered and the middle.

• between the end where the lighter gas entered and the middle.

• exactly in the middle.

The pressure of a sample of helium in a 200. mL container is 2.0 atm. If the helium is compressed to a volume of 10. mL without changing the temperature, what would be the pressure of the gas?

• 10 atm

• 1.0 atm

• 4.0 atm

• 40. atm

The volume of a gas at 7.00°C is 49.0 mL. If the volume increases to 74.0 mL and the pressure is constant, what will the temperature of the gas be?

• 1.50 ^oC

• 150. ^oC

• 4.64 ^oC

• 51.8^oC

The pressure of a 70.0 L sample of gas is 600. mm Hg at 20.0°C. If the temperature drops to 15.0°C and the volume expands to 90.0 L, what will the pressure of the gas be?

• 20 mmHg

• 350 mmHg

• 459 mmHg

• 550 mmHg

Which of the following is NOT a basic assumption of the Kinetic Molecular Theory?

• Gases consist of large numbers of tiny particles that are far apart in comparison to their size.

• All collisions between gas particles and between particles and the sides of the container are elastic.

• The particles of gas move very, very slowly.

• There is no force of attraction between gas particles.

The kinetic molecular theory states that ideal gas molecules

• are in constant, rapid, random motion.

• slow down as temperature increases.

• exert force of attraction and repulsion on each other.

• have high densities compared to liquids and solids.

Tags

NGSS.HS-PS2-1

Which container will have a lower pressure?

• left

• right

• they both have the same pressure

• cannot be determined

A student collects ethane at a temperature of 25.0°C and a total pressure of 100.0 atm. The volume of the collection bottle is 125mL. How many moles of ethane are in the bottle?

• 0.613 mol

• 0.511 mol

• 10.0 mol

• 6.10 mol