Chemistry

A gas fills 80ml at 740mm. what volume will it have at standard pressure?

Stuck on this problem. Please Help.

Thanks

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asked by Maggie
  1. PV = nRT
    P = 740/760 atmospheres.
    V = 0.080 L.
    solve for n
    R = 0.08205 L*atm/mol*K
    T = not given so use anything but use the same T here that you use in the next run. I would use 273.

    Now substitute n into
    PV = nRT.
    Standard P = 1 atm
    V = solve for V. The answer will be in L.
    n = use from above.
    T = 273.

    There is a much easier way to do it.
    P1V1 = P2V2.
    Use P1=740
    P2 = 760
    V1 = 80
    V2 = solve for this.
    You may want to do it both ways to verify that the answer is the same. One note: the answer the first way will be in liters and the answer the second way will be in mL.

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