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2 August, 01:39

What is the mass of 8.0 x 10^26 UF6 molecules?

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  1. 2 August, 01:44
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    First, find the number of moles of UF6

    Avagadro's number = 6.023 x 10^23

    Number of moles = 8.0 x 10^26 / Avagadro's number = 8.0 x 10^26 / 6.023 x 10^23 = 1.328 x 10³ moles

    Molecular weight of UF6 = Molecular weight of U (238.02891) + Molecular weight of F6 (6 x 18.9984032) = 238.02891 + 113.9904192 = 352.0193292 g/mol

    Therefore mass of 8.0 x 10^26 UF6 molecules = 352.0193292 g/mol x 1.328 x 10³ moles = 467.481669 x 10³ grams
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