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Weight of Calcium phosphate that contains 1 mole of oxygen atoms in it is

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79.5 g

19.375 g

58.25 g

38.75 g

answer is D.

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Detailed Solution

Formula of calcium phosphate is ${Ca}_{3} {({PO}_{4})}_{2}$

Every 1 mole of ${Ca}_{3} {({PO}_{4})}_{2}$ contains 8 mole of Oxygen atoms.

In $\frac{1}{8}$ th mole of ${Ca}_{3} {({PO}_{4})}_{2}$ , there will be 1 mole of Oxygen atoms.

Mass of $\frac{1}{8}$ th mole of Calcium phosphate= $\frac{Molecular weight 310}{8} = 38.75$

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