Quiz 7 Gases

Karen Timberlake

Answer the questions below and then click "submit" to send your answers.

  1. In a gas, the gas particles

    2. Your answer:
    are far apart from each other.
    are moving rapidly.
    do not attract or repel.
    all of the above

  2. A gas pressure of 0.75 atm is the same as

    3. Your answer:
    190 mm Hg
    570 mm Hg
    760 mm Hg
    1000 mm Hg

  3. At its boiling point, the vapor pressure of a liquid

    4. Your answer:
    is equal to the external pressure
    is above the external pressure
    is not known.
    is equal to 760 mm Hg

  4. According to Boyle's Law, a decrease in the pressure of a gas occurs when the

    5. Your answer:
    volume is increased.
    volume is decreased.
    temperature is increased.
    temperature is decreased.

  5. A sample of helium gas has a volume of 5.0 L and a pressure of 1.20 atm. What is the new pressure of the helium when a container with a volume of 2.0 L is used to hold the gas?

    6. Your answer:
    2.4 atm
    3.0 atm
    0.48 atm
    0.24 atm

  6. Boyle's Law is important in respiration because

    7. Your answer:
    we inhale when lung volume increases
    we exhale when lung volume decreases
    the volume of the lungs changes as the diaphragm relaxes and contracts
    all of the above

  7. A sample of neon has a volume of 6.0 L at a temperature of 12oC. What is the new volume of the neon at a temperature of 36oC(pressure remains constant)?

    8. Your answer:
    18 L
    6.5 L
    5.5 L
    2.0 L

  8. A sample of argon gas has a pressure of 720 mm Hg at a temperature of 450K. What is the pressure of the argon at a temperature of 150K (volume remains constant)?

    9. Your answer:
    1100 mm Hg
    480 mm Hg
    2200 mm Hg
    240 mm Hg

  9. A 3.0 L sample of nitrogen gas (N2) has a pressure of 1.0 atm and a temperature of 75K. What is the new volume of the sample when the pressure is 2.0 atm and a temperature of 225K?

    10. Your answer:
    6.0 L
    4.5 L
    18 L
    2.0 L

  10. At STP, one mole of the gas

    11. Your answer:
    has a temperature of 273 K
    has a pressure of 1.00 atm
    occupies a volume of 22.4 L
    all of the above

  11. At STP, 2.00 g of helium gas has a volume of

    12. Your answer:
    5.60 L
    44.8 L
    22.4 L
    11.2 L

  12. What is the total pressure of a gas mixture that contains 0.25 atm of oxygen gas and 440 mm Hg?

    13. Your answer:
    1200 mm Hg
    440.25 mm Hg
    630 mm Hg
    760 mm Hg

  13. What volume of HCl is produced at STP when 0.250 mole of hydrogen gas react with chlorine gas according to the equation H2(g) + Cl2(g) = 2HCl(g)?

    14. Your answer:
    5.60 L
    11.2 L
    22.4 L
    44.8 L

  14. A gas mixture contains neon at a partial pressure of 326 mm Hg and nitrogen gas at 0.650 atm. What is the total pressure of the gas mixture after it is transferred to a container that is twice the volume of the original container(temperature remains constant)?

    15. Your answer:
    820. mm Hg
    410. mm Hg
    205 mm Hg
    1640 mm Hg

  15. A weather balloon is filled with 120 L of helium at 15oC and a pressume of 0.80 atm. What is the volume of the balloon after it rises in the atomsphere to an altitude where the pressure is 0.10 atm and the temperature is -78oC?

    16. Your answer:
    650 L
    960 L
    1400 L
    1200 L

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