ideal and combine gas laws II

If the pressure exerted by a gas at 298 K in a volume of 0.044 L is 3.81 atm, how many moles of gas are present? n=PV/RT

• .002766 mole

• .0069 mole

• 2.766 mole

• 9.887 mole

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

• 7.18 L

• 7.81 L

• 4.63 L

• 4.36 L

What is the pressure in atmospheres of a 0.108-mol sample of helium gas at a temperature of 293 K if its volume is 0.505 L? P=nRT/V

• 90.7 atm

• 22.4 atm

• 29.3 atm

• 5.14 atm

What is the temperature of natural gas in an oil pipeline if we know there are 0.91 moles of the gas in the pipeline and the volume of the pipeline is 5.43 L and the gas is exerting a pressure of 4.21 atm? T=PV/nR

• 306 °C

• 225 K

• 306 K

• 712K

When a cold tire is inflated to a certain pressure and then is warmed up due to friction with the road, the pressure increases. This happens because the

• air molecules hit the walls of the tire less frequently
• rubber in the tires reacts with oxygen in the atmosphere
• air molecules speed up and collide with the tire walls more often
• air molecules diffuse rapidly through the walls of the tire.

Tags

NGSS.HS-PS3-2

Higher pressure means ______________ collisions between gas particles and the walls of their container.

• more
• less
• faster
• harder

What is the approximate volume of a 0.600 mole sample of gas at 288 K and a pressure of 1.10atm? V=nRT/P

• 12.9 L

• 22.4 L

• 24.6 L

• 129 L

If 10L of O₂ at 273K and 1 atm is compressed to a 7L container at 250K, what is the new pressure?

P₂= P₁V₁T₂/V₂T₁

• 1.31 atm

• 9.16 atm

• 0.76 atm

• 6.0 atm

Pressure and temperature have a(n) _________ proportionality.

• direct
• inverse
• linear
• exponential

At constant volume, what happens to temperature of a gas when the pressure doubles?

• The temperature also doubles.
• The temperature decreases to half its original volume.
• The temperature doesn't change.
• The temperature quadruples.