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26 May, 06:45

Two liters of a perfect gas are at 0>c and 1 atm. if the gas is nitrogen, n2, determine the number of molecules.

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  1. 26 May, 06:53
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    Solution;

    The gas is at STP;

    Where; T = 273 K, P = 1 atm

    We know that 1 mole of a gas at STP occupies a volume of 22.4 liters.

    V1/n1 = V2/n2

    n2 = (V2/V1) n1

    n2 = (2 l/22.4 l) (1 mole)

    n2 = 0.0893 moles

    But 1 mole of a compound has 6.022 * 10^23 molecules

    Thus, number of molecules = 0.0893 moles * 6.022 * 10^23 molecules

    = 5.378 * 10^22 molecules.
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