Mr(Zn(NO3)2) = 65 + 14*2 + 16*6 = 189
W(Zn) = Ar(Zn) * n / Mr(Zn(NO3)2 *100% = 65 *1 / 189 *100% = 34%
Mr(Zn(NO3)2) = 65 + 14*2 + 16*6 = 189
W(Zn) = Ar(Zn) * n / Mr(Zn(NO3)2 *100% = 65 *1 / 189 *100% = 34%