Partial Pressure and Gases under 2-Sets of Conditions

A sample of neon gas occupies a volume of 752 mL at 25°C. What volume will the gas occupy at 50.°C if the pressure remains constant?

• 8150 mL

• 408 mL

• 815 mL

• 204 mL

What are the standard temperature and pressure conditions for gases?

• 0 K and 760 mm Hg
• 273˚C and 1.0 atm
• 273 K and 101.3 kPa
• 0˚C and 760 kPa

A sample of gas with a volume of 30.0 mL at 25.0^oC is heated to 50.0^oC.  What is the new volume of the gas?

• 60.0 mL
• 15.0 mL
• 27.5 mL
• 32.5 mL

Tags

NGSS.HS-PS1-5

You have a gas that has a pressure of 2 atm and a volume of 10L. What would be the new volume if the pressure was changed to 1 atm? Based on this information are Pressure and volume directly or inversely proportional?

• 5 L ; directly proportional

• 20 L; inversely proportional

• It would stay at 10L; directly proportional

• 1 L; inversely proportional

A sample of oxygen gas has a volume of 150.0 mL when its pressure is .947 atm. What will the volume of the gas be if it is lowered to a pressure of 0.658 atm and the temperature remains constant?

• 72 mL
• 144 mL
• 216 mL
• 288 mL

Three gases, Ar, N₂ and H₂ are mixed in a sealed container. Ar has a pressure of 255 torr, N₂ has a pressure of 228torr and H₂ has pressure of 752torr. What is the total pressure in the container?

• 483torr
• 270torr
• 1235torr

A container is filled with H₂, and H₂O. Calculate the partial pressure of H₂ when the pressure of water is 17torr. The total pressure of the gases is 750torr.

• 767.5 torr

• 733 torr

• 42.86 torr

The partial pressures of CH₄, N₂, and O₂ in a sample of gas were found to be 135 mm Hg, 508 mm Hg, and 571 mm Hg, respectively. Calculate the mole fraction of nitrogen.

• 20.4

• 0.470

• 0.418

• 0.751

A balloon with a volume of 200 mL at 30. ^οC is placed in a hot room at a temperature of 50. ^οC. What will happen to the volume of the balloon if the pressure remains the same? [NO math required. Is Volume and Temperature (in K) for a gas inversely or directly proportional.]

• the volume of the balloon will become higher than 200 mL

• the volume of the balloon will become lower than 200 mL

• the volume of the balloon will stay the same

• there is no enough data

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