March 25, 2017

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A sample of 40.0 mL of hydrogen is collected by water displacement at a temperature of 20 degrees Celcius. The barometer reads 751 torr. What is the volume of the hydrogen at STP (standard temperature and pressure)?

  • Chemistry - ,

    Use(P1V1/T1) = (P2V2/T2)
    For P1 substitute 751-vapor pressure H2O @ 20 C.
    V1 = 40.0 mL
    T1 = 273+20 = ? kelvin.
    P2 and T2 are standard conditions. Solve for V2.
    Note the correct spelling of celsius.

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