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It takes 16.6 min for a 10.0 mL sample of an unknown gas to effuse through a pinhole.

  1. Sep 21, 2009 #1
    1. The problem statement, all variables and given/known data
    It takes 16.6 min for a 10.0 mL sample of an unknown gas to effuse through a pinhole. A 10.0 -mL sample of
    helium, He, required 5.00 min. What is the molar mass of the unknown gas?


    2. Relevant equations

    No idea =/

    3. The attempt at a solution

    No idea =/
    Don't know the relationship between time and volume and moles @__@
     
  2. jcsd
  3. Sep 21, 2009 #2

    Borek

    User Avatar

    Staff: Mentor

    Re: It takes 16.6 min for a 10.0 mL sample of an unknown gas to effuse through a pinh

    Check Graham's law.

    --
    methods
     
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