Question

i) Calculate the molecular weight and percentage of calcium in calcium phosphate,
Ca3(PO4)2.
[At. wts. are Ca = 40, P = 31, O = 16]​

Answer 1

Explanation:

molecular weight of calcium=3*40=120

molecular weight of compound=3*40+2*30+8*16

=120+60+128=308

% of calcium in calcium phosphate

=molecular weight of calcium/molecular weight of compound*100

=120/308*100

=38.96%

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Answer 2

Explanation:

Calculate the molecular weight and percentage of calcium in calcium phosphate,

Ca3(PO4)2.

[At. wts. are Ca = 40, P = 31, O = 16]