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11 March, 07:12

Tooth enamel is ca5 (po4) 3 (oh). calculate the percent composition of the elements present.

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  1. 11 March, 09:31
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    We shall find the molar mass first.

    Ca5 (PO4) 3 (OH) = (40 * 5) + 3 (31 + 4 (16)) + 16 + 1 = 200 + 285 + 17 = 485 + 17 = 502.

    Percent of Calcium = 200 / 502 * 100 = 39.8%

    Percent of Phosphorus = 91/502 * 100 = 18.1%

    Percent of Hydrogen = 1/502 * 100 = 0.19%

    Percent of Oxygen = 100 - (39.8 + 18.1 + 0.19) = 41.91%
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