MP4: 4 Wks exam review

What is the partial pressure of N2 gas in a mixture of He and N2 if the total pressure is 4,232 mmHg and the partial pressure of He is 4.3 atm?

• 1.27 atm

• 4,227.70 atm

• -1.27 atm

• 9.87 atm

At what temperature (in Kelvin) would 8.08 g of H2 gas in a 100,000 mL container exert a pressure of 1.00 atmospheres?

• 0.0305 K

• 32.8 K

• 0.487 K

• 303.03 K

What is the pressure (in psi) of 4 moles of hydrogen gas in a container with a volume of 4.3L at 31.5°C?

• 0.42 psi

• 2.40 psi

• 23.24 atm

• 341.63 psi

Batman enjoys balloon animals from the carnival. He just received a balloon giraffe that has an initial temperature of 39.0°C and a volume of 1.28 L. If superman plays a trick on batman, and puts his balloon giraffe into the freezer, what would be the new volume of the balloon if the temperature drops down to 281 K?

• 1.42 L

• 3.78 L

• 6.85 x 10^4 L

• 1.15 L

A certain gas occupies 6.24 L at pressure of 760 mm Hg. If the pressure is reduced to 60.0 mm Hg, what would the new volume be?

• 79.0 L

• 60.0 L

• 0.493 L

• 760.0 L

A gas at a volume of 4 liters is at a pressure of 2 atm. The volume is changed to 16,000 mL, what must the new pressure be?

• 2 atm

• 10 atm

• 12 atm

• 0.5 atm

A container holds three gases: oxygen, carbon dioxide, and helium. The partial pressures of the three gases are 29.4 psi, 3.00 atm, and 3,040 torr, respectively. What is the total pressure inside the container?

• 2 atm

• 3 atm

• 4 atm

• 9 atm

Observe the balloons A and B above. Both balloons have a temperature of 25.0°C, contain 0.50 moles of gas sealed by the knot at the bottom, and have a volume of 2.2 L.

If balloon A is placed in a freezer with a temperature of -5.50°C, which of the following statements regarding the volumes of the balloons is accurate?

• The balloons will remain unchanged and have equal volume at 2.2 L.

• Balloon A will be smaller due to fewer moles of gas in the balloon.

• Balloon A will be larger due to lower pressure inside the freezer.

• Balloon A will be smaller due to the gas particles moving slower.

Tags

NGSS.MS-PS1-4

The volume of a gas is 50.0 mL at 20.0 K. What will be the new temperature if the gas is compressed to 0.01 L under constant pressure?

• 100 K

• 10.0 K

• 4.00 K

• 5.00 K

Calculate the approximate volume (in mL) of a 1.50 mol sample of gas at 15.0°C and a pressure of 3.75 atm.

• 9,450 mL

• 5,930 mL

• 8.65 L

• 9.46 L