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Calculate the mass per cent of calcium, ...

Calculate the mass per cent of calcium, phosphorus and oxygen in calcium phosphate `Ca_(3)(PO_(4))_(2)`.

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Mass percent of calcium `= (3 xx ("Atomic mass of calcium"))/("molecular mass of "Ca_(3)(PO_(4))_(2)) xx 100 = (120 u)/(310 u) xx 100 = 38.71 %`
Mass percent of phosphorous `= (2 xx ("Atomic mass of phosphorus"))/("molecular mass of "Ca_(3)(PO_(4))_(2)) xx 100 = (2 xx 31u)/(310 u) xx 100 = 20 %`
Mass percent of oxygen `= (8 xx ("Atomic mass of oxygen"))/("molecular mass of "Ca_(3)(PO_(4))_(2)) xx 100 = (8 xx 16u)/(310 u) xx 100 = 41.29 %`
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