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Homework Help: Pressure problem

  1. Dec 7, 2011 #1
    1. The problem statement, all variables and given/known data

    Clouds of interstellar hydrogen gas have densities of up to 1.0 X 10^10 atoms/m^3 and temperatures of up to 1.0 X 10^4 K. What is the pressure in such a cloud?



    2. Relevant equations

    Ideal-Gas Law: pV=nRT



    3. The attempt at a solution

    I don't know how to find the volume or number of moles for the equation.

    Please help.
     
  2. jcsd
  3. Dec 7, 2011 #2

    gneill

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    Staff: Mentor

    Within the cloud is there anything to distinguish one sample volume from another?
     
  4. Dec 7, 2011 #3
    I don't really know.
     
  5. Dec 7, 2011 #4

    gneill

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    Staff: Mentor

    Is there anything in the question that would suggest that anything but a representative sample is to be considered?
     
  6. Dec 7, 2011 #5
    No there is not anything within the question other than what is stated above.
     
  7. Dec 7, 2011 #6

    gneill

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    Staff: Mentor

    So any sample of the cloud will do, right? What would be a convenient size of sample?
     
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