Mr(Na3PO4)=23*3+31+16*4=164
W(Na)=Ar(Na)*n/Mr(Na3PO4) *100%=23*3/164 *100%=42%
W(P)=31*1/164*100%=19%
W(O)=Ar(O)*n/Mr(Na3PO4)=16*4/164*100%=39%
Mr(Fe2O3)=56*2+16*3=160
W(Fe)=Ar(Fe)*n/Mr(Fe2O3)*100%=56*2/160*100%=70%
W(O)=Ar(O)*n/Mr(Fe2O3)*100%=16*3/160*100%=30%
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Mr(Na3PO4)=23*3+31+16*4=164
W(Na)=Ar(Na)*n/Mr(Na3PO4) *100%=23*3/164 *100%=42%
W(P)=31*1/164*100%=19%
W(O)=Ar(O)*n/Mr(Na3PO4)=16*4/164*100%=39%
Mr(Fe2O3)=56*2+16*3=160
W(Fe)=Ar(Fe)*n/Mr(Fe2O3)*100%=56*2/160*100%=70%
W(O)=Ar(O)*n/Mr(Fe2O3)*100%=16*3/160*100%=30%