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What volume would this air occupy at STP?

  1. Apr 30, 2012 #1
    1. The problem statement, all variables and given/known data

    A 12.0 cm-diameter compressed-air tank is 50.0 cm tall. The pressure at 30.0 C is 110 atm .

    What volume would this air occupy at STP?

    2. Relevant equations

    V=nRT/P


    3. The attempt at a solution

    The first question asked to find the amount of moles of air in the tank, and got it right with an answer of 25. So I plugged in:

    (25mols)(.0821)(273K)/(1*10^5)

    And got .0056 m^3, but that seems to be wrong. Any help would be appreciated. Thanks!
     
  2. jcsd
  3. Apr 30, 2012 #2

    cepheid

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    Science Advisor
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    Check into Avogadro's law. An ideal gas occupies a specific number of litres per mole at STP.
     
  4. Apr 30, 2012 #3
    Ah okay, so I converted wrong. It would be .56 m^3. Thanks!
     
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