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Homework Help: What volume does this sample occupy?

  1. Jun 8, 2003 #1

    Dx

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    A given sample of C@2 contains 3.01x10^23 molecules at STP. what does the samle occupy?

    Im not going to put down all the formulas i used since i got this wrong on a test question, can anyone tell me what answer they came up with. I said 22.4L using V = .5mol/23.4mol/L= 22.4L or something to that effect.

    Dx :wink:
     
  2. jcsd
  3. Jun 9, 2003 #2

    enigma

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    P*V=n*R*T

    You're given P,T,n, and R is a constant. Solve for V.
     
  4. Jun 9, 2003 #3

    Dx

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    I tried enigama and got it wrong. What did i do wrong?

    T = 273K
    R = 8.315 J/mol*K
    P 1.013 x 10^5
    n = 3.01 x 10^23

    V= nRT/P but my answer is wrong can you figure out what ive done wrong, pls explain?
    Dx
     
  5. Jun 9, 2003 #4

    Tom Mattson

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    Here's your problem. n is supposed to be the number of moles, but you inserted the number of molecules.
     
  6. Jun 9, 2003 #5

    Dx

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    O gosh, what a dummie I am!
    Thanks you guys rule!
    Later
    Dx :wink:
     
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