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6 October, 03:00

How many moles are in 30 grams of H3PO4?

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  1. 6 October, 03:16
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    Mass = Moles x GFM

    mass = 30g so;

    30 = mol x GFM

    To calculate the GFM, you require a data booklet or similar.

    Mine tells me that the GFMs are:

    H: 1 H₃ so 3 x 1 = 3

    P: 31 P so 1 x 31 = 31

    O:16 O₄ so 4 x 16 = 64

    GFM = 64 + 31 + 3 = 98

    30 = 98 x mol

    mol = 30 / 98

    mol = 0.31 mol
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