Mr(Na2SO4)=23×2+32+16×4=142
w(Na)=(46/142)×100%=32.4%
w(S)=(32/142)×100%=22.5%
w(O)=(64/142)×100%=45.1%
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Mr(Na2SO4)=23×2+32+16×4=142
w(Na)=(46/142)×100%=32.4%
w(S)=(32/142)×100%=22.5%
w(O)=(64/142)×100%=45.1%