calculate mass percentage of Ca , P and O in Ca3 ( Po4)2
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Molecular formula of calcium phosphate is Ca 3 (PO 4 ) 2
.
Its molar mass is 3(40)+2(31)+8(16)=310 g/mol.
Percent of calcium = 120/310×100=38.71%
Percent of phosphorus =
62/310 ×100=20.0%
Percent of oxygen =
128/310×100=41.29%
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