Объяснение:
Mr(Fe2(SO4)3) = 56*2 + 32*3+16*12 =342
W(Fe) = Ar(Fe) *n / Mr(Fe2(SO4)3) *100% = 56*2 / 342 *100% =33%
W(S) = Ar(S) *n / Mr(Fe2(SO4)3) *100% = 32*3 / 342 *100% = 28%
W(O) = Ar(O) *n / Mr(Fe2(SO4)3) *100% =16*12 / 342 *100% =39%
Объяснение:
Mr(Fe2(SO4)3) = 56*2 + 32*3+16*12 =342
W(Fe) = Ar(Fe) *n / Mr(Fe2(SO4)3) *100% = 56*2 / 342 *100% =33%
W(S) = Ar(S) *n / Mr(Fe2(SO4)3) *100% = 32*3 / 342 *100% = 28%
W(O) = Ar(O) *n / Mr(Fe2(SO4)3) *100% =16*12 / 342 *100% =39%