# Spring Practice Chemistry Final

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Spring Practice Final 2011

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.

____ 1. The volume of a gas is 400.0 mL when the pressure is 1.00 atm. At the same temperature, what is the pressure at which the volume of the gas is 2.0 L? a. | 0.5 atm | c. | 0.20 atm | b. | 5.0 atm | d. | 800 atm |

____ 2. The pressure of a sample of helium is 2.0 atm in a 200-mL container. If the container is compressed to 10 mL without changing the temperature, what is the new pressure? a. | 200 atm | c. | 100 atm | b. | 0.10 atm | d. | 40. atm |

____ 3. A sample of argon gas at standard pressure occupies 1000. mL. At constant temperature, what volume does the gas occupy if
| 30.ºC | d. | 273ºC |

____ 19. A sample of gas at 6.0 atm and 5.0ºC increases in temperature to 35ºC. If the volume is unchanged, what is the new pressure? a. | 5.4 atm | c. | 36 atm | b. | 6.6 atm | d. | 42 atm |

____ 20. The volume of a sample of oxygen is 300.0 mL when the pressure is 1 atm and the temperature is 27.0ºC. At what temperature is the volume 1.00 L and the pressure 0.500 atm? a. | 22.0ºC | c. | 0.50 K | b. | 45.0ºC | d. | 227ºC |

____ 21. Suppose that the pressure of 1.00 L of gas is 380. mm Hg when the temperature is 200. K. At what temperature is the volume 2.00 L and the pressure 0.750 atm? a. | 1.00 K | c. | 219ºC | b. | 600. K | d. | 67.0 K |

____ 22. The volume of a gas collected when the temperature is 11.0ºC and the pressure is 710 mm Hg measures 14.8 mL. What is the calculated volume of the gas at 20.0ºC and 740 mm Hg? a. | 7.8 mL | c. | 14.6 mL | b. | 13.7 mL | d. | 15 mL |

____ 23. The volume of a sample of hydrogen is 798 mL and it exerts 621 mm Hg pressure at 5.00ºC. What volume does it occupy at standard temperature and pressure? a. | 520. mL | c. | 745 mL | b. | 640. mL | d. | 960 mL |

____ 24. A 30.-L sample of gas exerts 200. mm Hg pressure at 10ºC. What volume does the gas have at 300. mm Hg and 25ºC? a. | 9.0 L | c. | 21 L | b. | 17 L | d. | 42 L |

____ 25. A 70.0 L sample of gas at 20.0ºC and 600. mm Hg expands to 90.0 L at 15.0ºC. What is the new gas pressure?