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Density problem. help please

  1. Feb 26, 2009 #1
    1. The problem statement, all variables and given/known data

    What is the density of nitrogen gas at a temperature of 20 degrees celcius

    2. Relevant equations
    p= m/v??
    Pv=nRT??
    change in volume = (volumetric coefficicient of thermal expansion)(initial volume)(change in temperature)??


    3. The attempt at a solution
    i tried to use the coefficient of thermal expansion to find the changing volume but gasses dont have values for thermal expansion.

    now im not sure what to do
    any help is appreciated
     
  2. jcsd
  3. Feb 26, 2009 #2

    Delphi51

    User Avatar
    Homework Helper

    I remember that an ideal gas at standard pressure and temperature has one mole of molecules in a volume of 22.4 Liters. If you know the molar mass for nitrogen, you should be able to get the density from this. What is "standard" temperature in your class?
     
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