массовая доля элемента Na2SO AlPO4

Mr (Na2SO)=2*23+32+16= 94W(Na2)=2*23/94=0.49=49%W(S)=32/94=0.34=34%W(O)=16/94=0.17=17%Mr(AlPO4)=27+31+4*16=122W(Al)=27/122=0.22=22%W(P)=31/122=0.26=26%W(O4)=4*16/122=0.52=52%