HCHEM: Gases Remediation (2024)

Convert 123 kPa into mmHg

• 16.4 mmHg

• 923 mmHg

• 1.21 mmHg

• 12500 mmHg

At 20.^oC, a gas exerts a pressure of 8.53 atm. After heating the container, the pressure increases to 10.4 atm. What is the new temperature of the gas (in K)?

• 242 K

• 298 K

• 357 K

• 366 K

A steel tank with a volume of 9.58 L contains nitrogen gas under a pressure of 4.97 atm at 32^oC. Calculate the number of moles of nitrogen gas inside the tank.

• 0.002 mol

• 0.018 mol

• 0.525 mol

• 1.9 mol

P₁ = 0.071 atm V₁ = 5.0 mL P₂ = 0.092 atm

V₂ = ???

• 0.10 mL

• 3.9 mL

• 6.3 mL

• 7.8 mL

A 40.0 mL sample of fluorine gas is heated from 90.0^oC to 186^oC. What volume will this sample occupy at the higher temperature?

• 19.3 mL

• 31.6 mL

• 50.6 mL

• 82.6 mL

A gas mixture contains 3 different gases. Gas # 1 has a pressure of 100 kPa. Gas # 2 has a pressure of 125 kPa and Gas # 3 has a pressure of 75 kPa. What is the pressure of this mixture?

• 25 kPa

• 175 kPa

• 300 kPa

• 225 kPa

Which of these statement is FALSE?

• temperature can be measure in joules (J)

• pressure can be measured in atmospheres (atm)

• volume can be measured in milliliters (mL)

• the amount of a gas is measured in moles (mol)

TRUE or FALSE

Ideal gases exist in reality.

• TRUE

• FALSE