# Gas Law Review3: Question Preview (ID: 17879)

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14. What is the standard molar volume of a gas at STP? |
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a) 62.1 | b) 88.5 | c) 11.5 | d) 22.4 | |

15. A container holds 500 mL of CO2 at 20 degrees Celsius and 742 torr. What will be the volume of CO2 if the pressure is increased to 795 torr? |
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a) 466.66 | b) 588.88 | c) 846.18 | d) 854.11 | |

16. A gas tank holds 2785 L of propane at 830 mm Hg. What is the volume of propane at STP? |
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a) 8497.2 | b) 4684.6 | c) 3041.5 | d) 6548.2 | |

17. A container holds 50 mL of nitrogen at 25 degrees Celsius and a pressure of 736 mm Hg. What will be its volume if the temperature increases by 35 degrees Celsius? |
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a) 62.81 | b) 42.97 | c) 51.68 | d) 87.87 | |

18. A sample of oxygen occupies a volume of 160 L at 91 degrees Celsius. What will be the volume of oxygen when the temperature drops to 0 degrees Celsius? |
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a) 420 | b) 120 | c) 560 | d) 240 | |

19. A mylar balloon is filled with helium gas to a pressure of 107 kPa when the temperature is 22 degrees Celsius. If the temperature changes to 45 degrees Celsius, what will be the pressure of the helium in the balloon? |
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a) 225.64 | b) 587.12 | c) 115.34 | d) 284.64 | |

20. A cylinder of compressed gas has a pressure of 4.882 atm on one day. The next day the same cylinder has a pressure of 4.690 atm, and itâ€™s temperature is 8 degrees Celsius. What was the temperature on the previous day in degrees Celsius? |
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a) 815.3 | b) 946.7 | c) 648.2 | d) 292.5 | |

21. A gas take up a volume of 17 liters, has a pressure of 2.3 atm, and a temperature of 299 K. If I raise the temperature to 350 K and lower the pressure to 1.5 atm, what is the new volume of the gas? |
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a) 30.5 | b) 21.2 | c) 37.8 | d) 41.5 | |

22. A gas has a volume of 28 liters, a temperature of 45 degrees Celsius, and an unknown pressure has its volume increased to 34 liters and its temperature decreased to 35 degrees Celsius. If I measure the pressure after the change to be 2.0 atm, wha |
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a) 7.2 | b) 2.5 | c) 3.6 | d) 5.1 | |

23. Three flasks are connected to one another. The first flask contains helium at a pressure of 1.54 atm, the second flask contains nitrogen at .74 atm, and the third flask contains oxygen at 1.06 atm. What is the total pressure of this system? |
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a) 9.65 | b) 1.65 | c) 2.23 | d) 3.34 | |

24. If I added hydrogen to the system above and the total pressure increased to 4 atm, what was the partial pressure of hydrogen? |
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a) 0.66 | b) 0.49 | c) 1.47 | d) 1.11 | |

25. How many moles of gas does it take to occupy 120 liters at a pressure of 2.3 atm and a temperature of 340 K? |
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a) 14.89 | b) 20.15 | c) 36.22 | d) 10.15 | |

26. If I have a 50 liter container that holds 45 moles of gas at a temperature of 200 degrees Celsius, what is the pressure inside the container? |
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a) 30.7 | b) 34.1 | c) 43.9 | d) 40.1 | |

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