Mr(AgNO3) = 108 + 14 + 16*3 = 170W(Ag) = Ar(Ag) * n / Mr(AgNO3) * 100 = 108 *1 / 170 *100 = 63,5 W(N) = Ar(N) * n / Mr(AgNO3) *100 = 14 *1 / 170 *100 = 8W(O) = Ar(O) * n / Mr(AgNO3) *100 = 16 *3 / 170 *100 = 28