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Homework Help: Finding moles from volume? diatomic

  1. Nov 12, 2008 #1
    1. The problem statement, all variables and given/known data
    I'm just going to preface this by saying I know zilch about chemistry, I'm not even sure how I passed it the last time I took it, which was in grade eleven.

    Is it possible for me to find moles of a gas with this information:
    volume: 100 m^3 of air
    The gas is a diatomic ideal gas
    We are NOT at STP. The temp is 300 K.

    2. Relevant equations

    n = N/V

    3. The attempt at a solution
    I'm think diatomic means two... atoms... in a molecule? :P and i know
    n = N/V, where N is the number of molecules. But I don't know the number of molecules. I'm not even sure this is possible, I've attempted to look it up on the net but most things seem to assume STP.
    I apologize for this silly question. :(
  2. jcsd
  3. Nov 13, 2008 #2


    User Avatar

    Staff: Mentor

    Volume and temperature are not enough, you need pressure as well and you have to use ideal gas equation. Whether gas is diatomic doesn't matter at this moment.
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