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26 May, 13:51

What is the molar mass of 81.50g of gas exerting a pressure of 1.75atm on the walls of a 4.92L container at 307K?

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  1. 26 May, 17:16
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    M = 81.50g, mm = m/n

    n = ?

    PV = nRT - - > n = PV/RT

    n = (1.75) (4.92) / (.0821) (307)

    n = 8.61/25.20 =.342

    --> mm = m/n = 81.5/.342 = 238.58
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