Chemistry Ch14&15 Exam

92 Questions | Total Attempts: 357

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Chemistry Quizzes & Trivia

Questions and Answers
  • 1. 
    A gas is confined in a steel tank with a volume of 6.982 L. At 20.20°C, the gas exerts a pressure of 8.532 atm. After heating the tank, the pressure of the gas increases to 10.406 atm. What is the temperature of the heated gas? 
    • A. 

      –32.60°C

    • B. 

      24.63°C

    • C. 

      84.59°C

    • D. 

      92.64°C

  • 2. 
    How many moles of helium gas are contained in a 4.0-L flask at STP?
    • A. 

      0.045 mol

    • B. 

      0.089 mol

    • C. 

      0.17 mol

    • D. 

      89 mol

  • 3. 
    A steel tank with a volume of 9.583 L contains N2 gas under a pressure of 4.972 atm at 31.8 °C. Calculate the number of moles of N2 in the tank
    • A. 

      0.002 mol

    • B. 

      0.018 mol

    • C. 

      0.525 mol

    • D. 

      1.90 mol

  • 4. 
    According to Gay-Lussac’s law: 
    • A. 

      Pressure is inversely proportional to volume at constant temperature.

    • B. 

      Pressure is directly proportional to temperature at constant volume

    • C. 

      Volume is inversely proportional to temperature at constant pressure

    • D. 

      Volume is directly proportional to temperature at constant pressure.

  • 5. 
    What volume of oxygen is needed to react with solid sulfur to form 6.20 L of sulfur dioxide?
    • A. 

      6.20 L

    • B. 

      7.20 L

    • C. 

      12.4 L

    • D. 

      99.2 L

  • 6. 
    How many moles of steam are produced at 2.00 atm and 202.0°C by the complete combustion of 12.50 L of methane gas? 
    • A. 

      0.001 mol

    • B. 

      0.012 mol

    • C. 

      0.640 mol

    • D. 

      1.28 mol

  • 7. 
    Four liters of gas at atmospheric pressure is compressed into a 0.85 L gas cylinder. What is the pressure of the compressed gas if its temperature remains constant? 
    • A. 

      0.15 atm

    • B. 

      0.21 atm

    • C. 

      3.4 atm

    • D. 

      4.7 atm

  • 8. 
    When a bicycle reaches the top of a hill with a tire volume of 0.80 L, the atmospheric pressure is 9.0 atm. What is the maximum volume of air that can be filled in the tire just before it bursts? 
    • A. 

      0.088 L

    • B. 

      1.2 L

    • C. 

      8.9 L

    • D. 

      11 L

  • 9. 
    When a milkshake is taken in through a straw at a pressure of 0.071 atm, the straw contains 5.0 mL of liquid. How much liquid is consumed at 0.092 atm? 
    • A. 

      0.10 mL

    • B. 

      3.9 mL

    • C. 

      6.3 mL

    • D. 

      7.8 mL

  • 10. 
    In a hospital, oxygen is administered to patients at 3.0 atm in a hyperbaric oxygen chamber. Oxygen gas, measuring 600.0 L, is compressed in a cylinder at 160.0 atm. What volume of oxygen can a cylinder supply at the given pressure? 
    • A. 

      11 L

    • B. 

      32 L

    • C. 

      11 x 103 L

    • D. 

      32 x 103 L

  • 11. 
    A 2.50 L balloon is filled with water at 2.27 atm. If the balloon is squeezed into a 0.80 L beaker and does NOT burst, what is the pressure of water in the balloon? 
    • A. 

      0.72 atm

    • B. 

      0.88 atm

    • C. 

      7.1 atm

    • D. 

      8.8 atm

  • 12. 
    A balloon is filled with 3.50 L of water at 24.0°C and 2.27 atm. If the balloon is placed outdoors on a hot day at a temperature of 34.0°C, what is the volume of the balloon at constant pressure? 
    • A. 

      2.47 L

    • B. 

      3.38 L

    • C. 

      3.61 L

    • D. 

      8.19 L

  • 13. 
    The volume of a sample of helium is 4.50 mL at 20.0°C and 203.0 kPa. What will its volume be at 10.0°C and 203.0 kPa? 
    • A. 

      2.25mL

    • B. 

      3.78 mL

    • C. 

      4.34 mL

    • D. 

      6.85 mL

  • 14. 
    The volume of a 24.0-g sample of methane gas is 22.8 L at 40.0°C and 4.00 atm. What will its volume be at 68.0°C and 4.00 atm? 
    • A. 

      20.9 L

    • B. 

      24.8 L

    • C. 

      38.7 L

    • D. 

      40.8 L

  • 15. 
    A 40.0-L sample of fluorine is heated from 90.0°C to 186.0°C. What volume will the sample occupy at the higher temperature? 
    • A. 

      19.3 L

    • B. 

      31.6 L

    • C. 

      50.5 L

    • D. 

      82.6 L

  • 16. 
    A welding torch requires 3200 L of ethylene gas at 3.00 atm. What will be the pressure of the gas if ethylene is supplied by a 250.0-L tank? 
    • A. 

      0.231 atm

    • B. 

      2.34 atm

    • C. 

      38.4 atm

    • D. 

      45.4 atm

  • 17. 
    The volume of a gas is 1.50 L at 30.0°C and 1.00 atm. What volume will the gas occupy if the temperature is raised to 134.0°C at constant pressure? 
    • A. 

      0.331 L

    • B. 

      1.11 L

    • C. 

      2.01 L

    • D. 

      6.70 L

  • 18. 
    A sample of carbon dioxide occupies a 2.54 dm3 container at STP. What is the volume of the gas at a pressure of 150.0 kPa and a temperature of 26.0°C? 
    • A. 

      0.180 dm3

    • B. 

      1.88 dm3

    • C. 

      2.24 dm3

    • D. 

      4.65 dm3

  • 19. 
    A diver finds the best corals at a depth of approximately 10.0 m. The diver’s lung capacity is 2.40 L. The air temperature is 32.0°C and the pressure is 101.30 kPa. What is the volume of the diver’s lungs at 10.00 m, at a temperature of 21.0°C, and a pressure of 141.20 kPa? 
    • A. 

      1.12 L

    • B. 

      1.66 L

    • C. 

      1.78 L

    • D. 

      4.86 L

  • 20. 
    One liter of a gas has a pressure of 150.00 kPa at 25.0°C. If the pressure increases to 600.0 kPa and the temperature to 100.0°C, what would be the new volume of the gas? 
    • A. 

      0.200 L

    • B. 

      0.312 L

    • C. 

      1.00 L

    • D. 

      2.90 L

  • 21. 
    The variable that stays constant when using the combined gas law is
    • A. 

      Amount of gas

    • B. 

      Pressure.

    • C. 

      Temperature.

    • D. 

      Volume.

  • 22. 
    The equation for the combined gas law can be used instead of which of the following equations?
    • A. 

      Boyle’s law

    • B. 

      Charles’s law

    • C. 

      Gay-Lussac’s law

    • D. 

      All of these

  • 23. 
    Which of the following expresses Avogadro’s principle? 
    • A. 

      Equal volumes of gases at the same temperature and pressure contain equal numbers of particles.

    • B. 

      One mole of any gas will occupy a certain volume at STP.

    • C. 

      STP stands for standard temperature and pressure.

    • D. 

      The molar volume of a gas is the volume that one mole occupies at STP.

  • 24. 
    What information is NOT given by the coefficients in a balanced chemical equation?
    • A. 

      The mass ratios of reactants and products

    • B. 

      The mole ratios of reactants and products

    • C. 

      The ratios of number of molecules of reactants and products

    • D. 

      The volume ratios of gaseous reactants and products d. the volume ratios of gaseous reactants and products the volume ratios of gaseous reactants and products

  • 25. 
    What volume will one mole of a gas occupy under standard temperature and pressure? 
    • A. 

      1 L

    • B. 

      22.4 L

    • C. 

      273 L

    • D. 

      293 L

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