В. Вычислите относительные молекулярные массы следующих веществ: 5 баллов
Mr( Na2SiO3) =
Mr (K3PO4) =
Mr ( Ca(OH)2 ) =
Mr( ZnF2)=
Mr(Ca(NO3)2 ) =
Mr( Na2SiO3) =
Mr (K3PO4) =
Mr ( Ca(OH)2 ) =
Mr( ZnF2)=
Mr(Ca(NO3)2 ) =
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Ответ:
Mr[Na2SiO3] = Ar[Na] * 2 + Ar[Si] + Ar[O] * 3 = 22.98976928 * 2 + 28.0855 + 15.9994 * 3 = 122.06323856
Mr[K3PO4] = Ar[K] * 3 + Ar[P] + Ar[O] * 4 = 39.0983 * 3 + 30.973762 + 15.9994 * 4 = 212.266262
Mr[Ca(OH)2] = Ar[Ca] + Ar[O] * 2 + Ar[H] * 2 = 40.078 + 15.9994 * 2 + 1.00794 * 2 = 74.09268
Mr[ZnF2] = Ar[Zn] + Ar[F] * 2 = 65.409 + 18.9984032 * 2 = 103.4058064
Mr[Ca(NO3)2] = Ar[Ca] + Ar[N] * 2 + Ar[O] * 6 = 40.078 + 14.0067 * 2 + 15.9994 * 6 = 164.0878
Объяснение: