Mole fraction, partial pressure combination

A container holds three gases: oxygen, carbon dioxide, and helium. The partial pressures of the three gases are 2.00 atm, 3.00 atm, and 4.00 atm, respectively. What is the total pressure inside the container?

• 2 atm
• 4 atm
• 3 atm
• 9 atm

A mixture of hydrogen, nitrogen, and water vapor has a total pressure of 864 mmHg. The partial pressure of hydrogen is 220 mmHg and that of nitrogen is 410 mmHg. What is the partial pressure of water vapor?

• 234 mmHg
• 1.37 mmHg
• 2.64 mmHg
• 1, 494 mmHg

Real gases deviate from ideal gas behavior because real gas particles have

• volume and some attraction for each other
• no volume and no attraction for each other
• no volume but some attraction for each other
• volume but no attraction for each other

Under what conditions does a real gas behave most like an ideal gas?

• at high temperatures and low pressure
• at high temperatures and high pressures
• at low temperatures and low pressure
• at low temperatures and high pressure

• Helium
• Nitrogen 
• Oxygen
• All have the same number of molecules

A container holds three gases: oxygen, carbon dioxide, and helium. The partial pressures of the three gases are 2.00 atm, 3.00 atm, and 4.00 atm, respectively. What is the total pressure inside the container?

• 2 atm
• 4 atm
• 3 atm
• 9 atm

• Helium
• Nitrogen 
• Oxygen
• All have the same number of molecules

A mixture of hydrogen, nitrogen, and water vapor has a total pressure of 864 mmHg. The partial pressure of hydrogen is 220 mmHg and that of nitrogen is 410 mmHg. What is the partial pressure of water vapor?

• 234 mmHg
• 1.37 mmHg
• 2.64 mmHg
• 1, 494 mmHg

• 550 kPa
• 900 kPa
• 200 kPa
• 350 kPa

A vessel with a volume of 26.9 L contains 28 g of nitrogen gas, 0.605 g of hydrogen gas, and 79.9 g of argon gas. At 25 ⁰C, what is the mole fraction of nitrogen?

• 0.303

• 0.606

• 0.258

• 0.999