Объяснение:
Mr(H2S) = 1*2 + 32 = 34
Mr(MgCO3) = 24 + 12 + 16*3 = 84
Mr(K2SO3) = 39*2 + 32 + 16*3 = 158
Mr(ZnCl2) = 65 + 35,5*2 = 136
Mr(Cl2O3) = 35,5*3 + 16*3 = 154,5
Объяснение:
Mr(H2S) = 1*2 + 32 = 34
Mr(MgCO3) = 24 + 12 + 16*3 = 84
Mr(K2SO3) = 39*2 + 32 + 16*3 = 158
Mr(ZnCl2) = 65 + 35,5*2 = 136
Mr(Cl2O3) = 35,5*3 + 16*3 = 154,5