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    kassiexomay's Avatar
    kassiexomay Posts: 1, Reputation: 1
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    #1

    May 30, 2010, 10:18 AM
    How do you figure out gases?
    A gas under a pressure of 74 mmHg and at a temperature of 75 C occupies a 500.--L container. How many moles of gas are in the container?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    May 31, 2010, 05:37 AM

    Use the formula PV = nRT

    Where P is the pressure of the gas,
    V is the volume of the gas
    n is the number of moles,
    R is the molar gas constant, with a value of 8.31 J/(Kmol)and
    T is the temperature of the gas.

    This value of R is for the SI units of all the above dimensions. You must convert pressure to pascals, volume to m^3, and temperature to kelvin if you use the value of R as 8.31 J/(Kmol).
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