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Homework Help: Determine whether or not oxygen can exist on the planet

  1. May 17, 2010 #1
    1. The problem statement, all variables and given/known data

    The escape velocity of Mars is 5 x 10 ^3 m/s . If the temperature of Mars is 300K , determine whether or not oxygen can exist on the planet . (Molecular mass of oxygen is 32 g/mol)

    2. Relevant equations

    3. The attempt at a solution

    Using p=1/3 rho <c^2>

    p= 1/3 (M/V) <c^2>

    pV=1/3 M <c^2> ---1

    Then using pV=nRT

    pV=2(8.31)(300) since there are 2 moles of oxygen ,


    Put this into 1

    4986=1/3 (32) <c^2>

    <c^2>= 467.44 m/s

    Since the mean square speed is lesser than the escape velocity , oxygen exist .

    Am i correct ?
  2. jcsd
  3. May 17, 2010 #2


    User Avatar
    Homework Helper

    Re: heat

    What is rho?

    What do you mean with that? Where are 2 moles of oxygen? On the entire Mars?

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