Calculate the mass percentage of calcium and phosphorus in Calcium phosphate

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

Calculate the mass percentage of composition of sulphur in calcium sulphate, CaSO_(4) [Ca = 40, S= 32, O= 16]

Calculate the percentage of chlorine present in calcium chloride.

The ore of calcium which contains phosphorus is

Calculate mass of one atom of calcium in gram.

Define valency . Calculate the valency of calcium in calcium phosphate, Ca_(3)(PO_(4))_(2)