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5 February, 22:42

What is the percent by mass of water in Na2SO4 x 10H2O

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  1. 5 February, 22:43
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    M (Na₂SO₄*10H₂O) = 322.196 g/mol

    M (H₂O) = 18.0153 g/mol

    w (H₂O) = 10M (H₂O) / M (Na₂SO₄*10H₂O)

    w (H₂O) = 10*18.0153/322.196=0.5591 (55.91%)
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