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How much is molecules and how much is else in 1cm3 od air?

  1. Sep 18, 2012 #1
    1. The problem statement, all variables and given/known data
    I will try to translate the best I can:
    In 1cm3 of air, how much of it is molecules and how much is the space between them. diameter of 1 molecule is 0,1nm and is has a sphere shape.

    so R=0,1nm
    space=1cm3

    2. Relevant equations
    V=4/3*R3*∏
    n=N/Na=V/V0
    Na=6,022*1023mol-1
    V0=22,4dm3

    3. The attempt at a solution

    I calculated that the V of the molecule is 4,187*10cm3 but then when I use the other formula (N/Na=V/V0) I get that there is less then one molecule in that space which is impossible. Please use cm3 everywhere.

    Thanks
     
    Last edited: Sep 18, 2012
  2. jcsd
  3. Sep 18, 2012 #2
    Thanks everyone you've been much help, I need it for tomorrow and you've solved it so quickly.
     
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