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Chemistry

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I don't really know how to go about this, Please help

1. Calculate the number of moles of the gas. Calculate the volume the gas would occupy at 100.0 C and 15.0 atm.
10.8 g He

2. Given the volume of 54.0 C and 790 torr, calculate the number of moles and mass.
38.1 L CO

  • Chemistry -

    1. Use PV = nRT.
    P = 15
    V = ?
    n = grams/molar mass = 10.8/4 = ?
    R = 0.08206 L*atm/mol*L
    T = 273 + 100 = ?

    2 is the same type problem but turned around a little.

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