W(Ca) =40*1/175*100%=22.85%
W(Cl)=35.5*2/175*100%=40.57%
W(O2)=16*4/175=*100%=36.57%
W(Mg)=24*1/148*100%=16.21%
W(N) =14*2/148*100%=18.91%
W(O)=16*6/148*100%=64.86%
W(Ca) =40*1/175*100%=22.85%
W(Cl)=35.5*2/175*100%=40.57%
W(O2)=16*4/175=*100%=36.57%
W(Mg)=24*1/148*100%=16.21%
W(N) =14*2/148*100%=18.91%
W(O)=16*6/148*100%=64.86%