1.

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

Answer»

Solution :Molar MASS of `Ca_(3)(PO_(4))_(2)=3xx40+(31+64)xx2=120+190=310" g MOL"^(-1)`
Ca PRESENT = 120 g. P present `=2xx31=62g, "O present "=2xx64=128g`
`%" of Ca"=(120)/(310)xx100=38.71%`
`%" of P"=(62)/(310)xx100=20.0%`
`%" of (O)=(128)/(310)xx100=41.29%.`


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