Fe = FeBr3 = ? = Fe2O3 = Fe = Fe3O4 = Fe2O3 = ? = Fe(No3)3 = Fe
осуществите превращение
112
244
Ответы на вопрос:
Mr[Na2Co3*10H2O] = Ar[Co] * 3 + Ar[H] * 20 + Ar[Na] * 2 + Ar[O] * 10 = 58.933195 * 3 + 1.00794 * 20 + 22.98976928 * 2 + 15.9994 * 10 = 402.93192356 = 403
Mr[Na2SO4*10H2O] = Ar[H] * 20 + Ar[Na] * 2 + Ar[O] * 14 + Ar[S] = 1.00794 * 20 + 22.98976928 * 2 + 15.9994 * 14 + 32.065 = 322.19493856
Mr[MgSO4*7H2O] = Ar[H] * 14 + Ar[Mg] + Ar[O] * 11 + Ar[S] = 1.00794 * 14 + 24.305 + 15.9994 * 11 + 32.065 = 246.47456 = 246
Mr[CaSO4*2H2O] = Ar[Ca] + Ar[H] * 4 + Ar[O] * 6 + Ar[S] = 40.078 + 1.00794 * 4 + 15.9994 * 6 + 32.065 = 172.17116 = 172
Объяснение:
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