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20 March, 02:24

a gas sample occupies a volume of 140 mL at a temperature of 296 K and a pressure of 98.2kPa. how many moles of gas are there? show work.

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  1. 20 March, 02:35
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    0.00559 mol

    Explanation:

    The following data were obtained from the question:

    V = 140mL = 0.14L

    T = 296K

    P = 98.2kPa = 98200Pa

    Recall: 101325Pa = 1atm

    98200Pa = 98200/101325 = 0.97atm

    R = 0.082atm. L/Kmol

    n = ?

    The number of mole (n) can be obtained as follows:

    PV = nRT

    n = PV / RT

    n = (0.97x0.14) / (0.082x296)

    n = 0.00559 mol

    Therefore, the number of mole of the gas present is 0.00559 mol
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