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Homework Help: Gas law hydrogen problem

  1. Dec 9, 2016 #1
    1. The problem statement, all variables and given/known data

    (introduction course of university physics)

    A 25- L container holds ideal hydrogen (H2) gas at a gauge pressure of 0.25 atm and a

    temperature of 0°C. What mass of hydrogen gas is in this container? The ATOMIC mass of

    hydrogen is 1.0 g/mol, the ideal gas constant is R = 8.314 J/mol•K = 0.0821 L ∙ atm/mol ∙ K, and

    1.00 atm = 101 kPa.

    A) 1.4 g B) 6.3 g C) 4.2 g D) 2.8 g E) 5.6 g

    Answer:D

    2. Relevant equations
    pV=nRT
    volumetric mass of H2

    3. The attempt at a solution

    I have no more idea other than the mentioned relevant equation

    Thank you
     
  2. jcsd
  3. Dec 9, 2016 #2
    Can you determine how many moles of hydrogen is in the container?
     
  4. Dec 9, 2016 #3

    DrClaude

    User Avatar

    Staff: Mentor

    What result do you get with that equation?
     
  5. Dec 9, 2016 #4
    oh yes... I figured it out!
    Thanks
     
    Last edited: Dec 9, 2016
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