2nd Unit-7 Quiz 21

What relationship can be interpreted from the diagram?

• As volume decreases, pressure decreases

• As pressure increases, volume increases

• As moles increase, temperature increases

• As pressure increases, volume decreases

The Pressure of a gas is DIRECTLY proportional to the TEMPERATURE of a gas in KELVIN (but not Celsius). If a gas is measured to have a volume of 0.5atm at 250K, what would the temperature need to be in order for the gas to have a pressure of 1.0 atm (all other variables held constant).

• 500 K

• 1000 K

• 125 K

• 0 K

Gas pressure is caused by

• gas molecules colliding with surfaces

• gas molecules condensing to a liquid

• gas molecules hitting other gas molecule

• barometers

A gas mixture contains He, Ar, and Kr at 768 torr, 356 torr, and 896 torr respectively. What is the mole fraction of argon in the mixture.

• 0.176

• 5.68

• 0.380

• 0.896

What volume of hydrogen will be produced at STP by the reaction 67.3 g of magnesium with excfess water according to the following reaction?
1Mg + 2H₂O --> Mg(OH)₂ + H₂

• 62L
• 65L
• 31L
• 124L

If a balloon is cooled what will happen to the volume?

• Volume will increase
• Volume will decrease
• Volume will not change

The Pressure of a gas is DIRECTLY proportional to the TEMPERATURE of a gas in KELVIN (but not Celsius). If a gas is measured to have a volume of 0.5atm at 250K, what would the temperature need to be in order for the gas to have a pressure of 1.0 atm (all other variables held constant).

• 500 K

• 1000 K

• 125 K

• 0 K

What relationship can be interpreted from the diagram?

• As volume decreases, pressure decreases

• As pressure increases, volume increases

• As moles increase, temperature increases

• As pressure increases, volume decreases