Mr(Na2SO4) = 23*2 + 32 + 16*4 =142
W(Na) = Ar(Na) *n / Mr(Na2SO4) *100% = 23*2 / 142 *100% =32%
W(S) = Ar(S) *n / Mr(Na2SO4) *100% = 32*1 / 142 *100% = 22%
W(O) = Ar(O) *n / Mr(Na2SO4) *100% = 16*4 / 142 *100% =46%
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Mr(Na2SO4) = 23*2 + 32 + 16*4 =142
W(Na) = Ar(Na) *n / Mr(Na2SO4) *100% = 23*2 / 142 *100% =32%
W(S) = Ar(S) *n / Mr(Na2SO4) *100% = 32*1 / 142 *100% = 22%
W(O) = Ar(O) *n / Mr(Na2SO4) *100% = 16*4 / 142 *100% =46%