Mr(MnBr2) = 55 + 80*2 = 215
W(Mn) = Ar(Mn) * n / Mr(MnBr2) *100% = 55 *1 / 215 *100% = 26%
W(Br) = Ar(Br) * n / Mr(MnBr2) *100% = 80 * 2 / 215 *100% = 74%
Mr(MnBr2) = 55 + 80*2 = 215
W(Mn) = Ar(Mn) * n / Mr(MnBr2) *100% = 55 *1 / 215 *100% = 26%
W(Br) = Ar(Br) * n / Mr(MnBr2) *100% = 80 * 2 / 215 *100% = 74%