What is the molecular weight of [Ca3 (PO4) 2]

Given:
Ca3 (PO4) 2

To find:
Mr (Ca3 (PO4) 2) -?

Decision:
1) The relative molecular weight of calcium phosphate is calculated using the periodic system of D.I. Mendeleev:
Mr (Ca3 (PO4) 2) = Ar (Ca) * N (Ca) + Ar (P) * N (P) + Ar (O) * N (O) = 40 * 3 + 31 * 2 + 16 * 4 * 2 = 310.

Answer: The relative molecular weight of Ca3 (PO4) 2 is 310.



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