а) Mr(ZnS) = 65 + 32 = 97
W(Zn) = Ar(Zn) *n / Mr(ZnS) *100% = 65 *1 / 97 *100% = 67%
б) Mr(ZnCO3) = 65 + 12 + 16*3 = 125
W(Zn) = Ar(Zn) *n / Mr(ZnCO3) *100% = 65 *1 / 125 *100% = 52%
в) Больше цинка в ZnS
а) Mr(ZnS) = 65 + 32 = 97
W(Zn) = Ar(Zn) *n / Mr(ZnS) *100% = 65 *1 / 97 *100% = 67%
б) Mr(ZnCO3) = 65 + 12 + 16*3 = 125
W(Zn) = Ar(Zn) *n / Mr(ZnCO3) *100% = 65 *1 / 125 *100% = 52%
в) Больше цинка в ZnS