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March 25, 2017

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A 0.286g sample of carbon dioxide, CO2, has a volume of 585mL and a pressure of 495mmHg . What is the temperature, in kelvins and degrees Celsius, of the gas?

  • chemistry - ,

    Use PV = nRT.
    P = 495 mm; convert to atm.
    V = 585 mL; convert to L.
    n = g/molar mass = 0.286/44 = ?
    R = you know
    T = kelvin. Substitute and solve for T in kelvin, the
    K = 273 + C to calculate C.

  • chemistry - ,

    When I've done the equation I've gotten 713.971 K for the first part. What have I done wrong?

  • chemistry - ,

    Probably nothing. Using 44 for the molar mass of CO2 I obtained 714.3 K. You may have punched in a wrong digit somewhere.
    For n I have 0.286/44 = 0.00650
    Using 44.01 for the molar mass gave me 714.5 K.

  • chemistry - ,

    thanks for your help

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