Verified answer

Ответ:

Mr[NO2] = Ar[N] + Ar[O] * 2 = 14.0067 + 15.9994 * 2 = 46.0055

Mr[N2O5] = Ar[N] * 2 + Ar[O] * 5 = 14.0067 * 2 + 15.9994 * 5 = 108.0104

Mr[Ca(NO3)2] = Ar[Ca] + Ar[N] * 2 + Ar[O] * 6 = 40.078 + 14.0067 * 2 + 15.9994 * 6 = 164.0878

Mr[MgO] = Ar[Mg] + Ar[O] = 24.305 + 15.9994 = 40.3044

Mr[Mg3N2] = Ar[Mg] * 3 + Ar[N] * 2 = 24.305 * 3 + 14.0067 * 2 = 100.9284

Mr[MgCO3] = Ar[Mg] + Ar[C] + Ar[O] * 3 = 24.305 + 12.0107 + 15.9994 * 3 = 84.3139

Объяснение: