Na2O, Fe2O3, Cl2O7, SO2,
Mr(Fe2O3) = 56*2 + 16*3 = 160
W(O) = Ar(O) *n / Mr(Fe2O3) *100% = 16 *3 / 160 *100%=30%
Mr(Cl2O7) = 35*2 + 16*7 = 182
W(O) = Ar(O) *n / Mr(Cl2O7) *100% = 16*7 / 182 *100% =61%
Ответ: в Cl2O7
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Na2O, Fe2O3, Cl2O7, SO2,
Mr(Fe2O3) = 56*2 + 16*3 = 160
W(O) = Ar(O) *n / Mr(Fe2O3) *100% = 16 *3 / 160 *100%=30%
Mr(Cl2O7) = 35*2 + 16*7 = 182
W(O) = Ar(O) *n / Mr(Cl2O7) *100% = 16*7 / 182 *100% =61%
Ответ: в Cl2O7