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24 January, 22:33

How many molecules of he are contained in a 10.0 l tank at 7.53 atm and 485 k?

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  1. 24 January, 22:37
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    1.126 x 10^22

    Explanation:

    pV = nRT

    7.53 x 10 = n x 8.31 x 485

    n = (7.53 x 10) / (8.31 x 485) = 0.0187 moles

    M = n x Avogadros number

    0.0187 x 6.02 x 10^23 = 1.126 x 10^22
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