Подсчитать молекулярные веса k2 co3, mn (no3)2.

Mr(K2CO3) = 39*2 + 12 + 16*3 = 138

W(K) = Ar(K) * n / Mr(K2CO3) *100% = 39 * 2 / 138 *100% =56%

W(C) = Ar(C) *n / Mr(K2CO3) *100% = 12 *1 / 138 *100% =9%

W(O) = Ar(O) * n / Mr(K2CO3) *100% = 16 * 3 / 138 *100% = 35%

Mr(Mn(NO3)2)  = 55 + 14*2 + 16 * 6 = 179

W(Mn) = Ar(Mn) * n / Mr(Mn(NO3)2 *100% = 55 *1 / 179 *100% =31%

W(N) = Ar(N) * n / Mr(Mn(NO3)2 *100% = 14 *2 / 179 *100% = 16%

W(O) = Ar(O) * n / Mr(Mn(NO3)2 *100% = 16 * 6 / 179 *100% = 54%