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Relative concentration vs. altitude

  1. Jan 31, 2009 #1
    Earth's atmosphere has roughly four molecules of nitrogen for every oxygen molecule at sea level;
    more precisely, the ratio is 78:21. Assuming a constant temperature at all altitudes (not really very
    accurate), what is the ratio at an altitude of 10km? Explain why your result is qualitative reasonable.

    I found this formula, describing nanoparticles in air. I guess it then also can be used for gas molecules?


    That way I get approx. 104:33
    Last edited: Feb 1, 2009
  2. jcsd
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