Tooth enamel is ca5(po4)3(oh). calculate the percent composition of the elements present.
2 answers:
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%
Tooth enamel is hydroxyapatite with the chemical formula Ca₅(Po₄)₃OH. The percent composition of the elements are:
Ca - 7.35%
Po - 92.02%
O - 0.59%
H - 0.04%
<u>FURTHER EXPLANATION</u>
Mass percent or percent composition is the ratio of an element's mass to the mass of the compound. It is mathematically expressed as:
To determine the percent composition of each element in tooth enamel, we first get the mass of the compound:
To get the percentage composition, use the first equation and plug in the appropriate values:
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<u>Keywords:</u> tooth enamel, percent composition
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