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11 December, 00:19

An anhydrous (water removed) salt has a formula mass of 160.167 g/mol. If the hydrated version of the salt has 8 mol of water associated with it, what is the mass % of water in the hydrated salt? Report your answer to three digits after the decimal.

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  1. 11 December, 00:46
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    Answer: 47.34%

    Explanation:

    Mass of anhydrous salt = 160.167g/mol

    Mass of the hydrate salt = 160.167 + 8 (18)

    160.167 + 144 = 304.167g

    % Mass of water in the hydrate salt =

    (144/304.167) x 100 = 47.34%
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