Regents Chemistry Test Preparation Practice

    Ideal Gas

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    Base your answers to questions 9 on the information below and on your knowledge of chemistry.

    Cylinder A and cylinder B are sealed, rigid cylinders with movable pistons. Each cylinder contains 500. milliliters of a gas sample at 101.3 kPa and 298 K. Cylinder A contains H2(g) and cylinder B contains N2(g). The diagrams below represent these two cylinders.

    gas-lows fig: chem12020-exam_g12.png

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    Base your answers to questions 10 on the information below and on your knowledge of chemistry.

    The enclosed cabin of a submarine has a volume of 2.4 × 105 liters, a temperature of 312 K, and a pressure of 116 kPa. As people in the cabin breathe, carbon dioxide gas, CO2(g), can build up to unsafe levels. Air in the cabin becomes unsafe to breathe when the mass of CO2(g) in this cabin exceeds 2156 grams.

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    Base your answers to questions 11 on the information below and on your knowledge of chemistry.

    A 200.-milliliter sample of CO2(g) is placed in a sealed, rigid cylinder with a movable piston at 296 K and 101.3 kPa.

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    Base your answers to questions 12 on the information below and on your knowledge of chemistry.

    In a laboratory activity, the volume of helium gas in a rigid cylinder with a movable piston is varied by changing the temperature of the gas. The activity is done at a constant pressure of 100. kPa. Data from the activity are plotted on the graph below.

    gas-lows fig: chem12019-exam_g16.png

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    Base your answers to questions 13 on the information below and on your knowledge of chemistry.

    The diagram and data below represent a gas and the conditions of pressure, volume, and temperature of the gas in a rigid cylinder with a moveable piston.

    gas-lows fig: chem12017-exam_g15.png

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    Base your answers to questions 14 on the information below and on your knowledge of chemistry.

    Cylinder A has a movable piston and contains hydrogen gas. An identical cylinder, B, contains methane gas. The diagram below represents these cylinders and the conditions of pressure, volume, and temperature of the gas in each cylinder.

    number-of-paritcles-and-valumes-of-gases fig: chem62013-exam_g14.png

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