Масовая часть- Al3NO3Ca3(PO4)2

Mr(Al3NO3)=3*27+14+3*16=143 W(Al)=81/143=0.57=57% W(N)=14/143=0.10=10% W(O)=48/143=0.33=33% Mr(Ca3(PO4)2)=3*40+2*31+8*16=310 W(Ca)=120/310=0.39=39% W(P)=62/310=0.20=20% W(O)=128/310=0.41=41%