Mixed Gas Laws

How many grams of helium occupy 98 L at a pressure of 2.8 atmospheres and a temperature of 292 K?

• 11 moles of gas

• 44.9 g

• 22 moles of gas

• 65.4 g

A balloon is filled with 35.0 L of helium in the morning when the temperature is 20.0 ⁰C. By noon the temperature has risen to 45.0 ⁰C. What is the new volume of the balloon?

• 380 L

• 38.0 L

• 3.0 L

• 8.0 L

A balloon that can hold 85 L of air is inflated with 70.63 grams of neon of gas at a pressure of 1.0 atmosphere. What is the temperature in Celcius (⁰C) of the balloon?

• 296 K = 230 C

• 212 K = -61 C

• 0 K = -273 C

• 296 K = 23 C

CaCO₃ decomposes at 1200 ⁰C to form CO₂ gas and CaO. If 25 L of CO₂ are collected at 1200 ⁰C, what will the volume of this gas be after it cools to 25 ⁰C?

• 51 L

• 5.1 L

• 1 L

• 700 L

A gas canister can tolerate internal pressures up to 210 atmospheres. If a 2.0 L canister holding 3.5 moles of gas is heated to 1350 ⁰C, will the canister explode?

• 230 atm. No, the canister will not explode.

• 230 atm. Yes, the canister will explode.

• 30 atm. No, the canister will not explode.

• 30 atm. Yes, the canister will explode.

If the pressure exerted by a gas at 25 degrees C in a volume of 0.044 L is 3.81 atm, how many moles of gas are present?

• .002766 mole
• .0069 mol
• 2.766 mol
• 9.887 mol

As number of moles goes up, volume 

• goes down.
• goes up.
• stays the same

Calculate the volume that a 0.323-mol sample of a gas will occupy at 265 K and a pressure of 0.900 atm.

• 7.18 L 
• 7.81 L
• 4.63 L
• 4.36 L

A sample of sulfur dioxide occupies a volume of 652 mL at 313 K and 150 atm. What volume will the sulfur dioxide occupy at 1 atm and 273 K?

• 1682.6 mL

• 20.7 mL

• 492.3 mL

• 842.1 mL

If I initially have a gas at a pressure of 12.0 atm, a volume of 23.0 liters, and a temperature of 200. K, and then I raise the pressure to 14.0 atm and increase the temperature to 350. K, what is the new volume of the gas

• 12.8 liters

• 34.5 liters

• 51 liters

• 6.4 liters

• none are correct