Сульфат алюминия w(al) ? w(s)? w(o)?

Question

Сульфат алюминия w(al) ? w(s)? w(o)?

Answer 1

Mr(Al2(SO4)3)=27*2+32*3+16*12=342
W(Al)=Ar(Al)*n/Mr(Al2(SO4)3. *100%=27*2/342 *100%=16%
W(S)=Ar(S)*n/Mr(Al2(SO4)3) *100%=32*3/342 *100%=28%
W(O)=Ar(O)*n/Mr(Al2(SO4)3 *100% =16*12/342 *100%=56%