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8 March, 02:19

How many molecules of h2o are equal to 97.2 g h2o

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  1. 8 March, 05:52
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    M (H₂O) = 97,2 g.

    n (H₂O) = m (H₂O) : M (H₂O).

    n (H₂O) = 97,2 g : 18 g/mol.

    n (H₂O) = 5,4 mol.

    N (H₂O) = n (H₂O) · Na.

    N (H₂O) = 5,4 mol · 6,023·10²³ 1/mol.

    N (H₂O) = 3,25·10²⁴ molecules of water.

    n - amount of substance.

    Na - Avogadro number.
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