MCa₃(PO₄)₂ = 3ACa+2(AP+4AO) = 3*40+2(31+4*16) = 310g/mol
mCa = 3*40=120g
mP=2*31=62g
mO=2*4*16=128g
%Ca=mCa/MCa₃(PO₄)₂*100 = 120/310*100 = Calculeaza !!
%P=mP/MCa₃(PO₄)₂*100=62/310*100= Calculeaza !!
%O=mO/MCa₃(PO₄)₂*100 = 128/310*100 = Calculeaza !!