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21 November, 20:54

Mass of 6.584 g. After it is heated, it has a mass of 4.194 g. What is the percentage by mass of water in the hydrate?

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  1. 21 November, 21:04
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    M₁=6.584 g

    m₂=4,194 g

    m (H₂O) = m₁-m₂

    w (H₂O) = m (H₂O) / m₁

    w (H₂O) = (m₁-m₂) / m₁

    w (H₂O) = (6.584-4.194) / 6.584=0.3630 (36.30%)

    the percentage by mass of water in the hydrate 36.30
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