Mr[K2CO3] = Ar[K] * 2 + Ar[C] + Ar[O] * 3 = 39.0983 * 2 + 12.0107 + 15.9994 * 3 = 138.2055=138
Mr[Zn3(PO4)2] = Ar[Zn] * 3 + Ar[P] * 2 + Ar[O] * 8 = 65.409 * 3 + 30.973762 * 2 + 15.9994 * 8 = 386.169724=386
Mr[CuCl2] = Ar[Cu] + Ar[Cl] * 2 = 63.546 + 35.453 * 2 = 134.452=134
Mr[H2SO4] = Ar[H] * 2 + Ar[S] + Ar[O] * 4 = 1.00794 * 2 + 32.065 + 15.9994 * 4 = 98.07848=98
Mr[Pb(OH)2] = Ar[Pb] + Ar[O] * 2 + Ar[H] * 2 = 207.2 + 15.9994 * 2 + 1.00794 * 2 = 241.21468=241
Объяснение:
Mr[K2CO3] = Ar[K] * 2 + Ar[C] + Ar[O] * 3 = 39.0983 * 2 + 12.0107 + 15.9994 * 3 = 138.2055=138
Mr[Zn3(PO4)2] = Ar[Zn] * 3 + Ar[P] * 2 + Ar[O] * 8 = 65.409 * 3 + 30.973762 * 2 + 15.9994 * 8 = 386.169724=386
Mr[CuCl2] = Ar[Cu] + Ar[Cl] * 2 = 63.546 + 35.453 * 2 = 134.452=134
Mr[H2SO4] = Ar[H] * 2 + Ar[S] + Ar[O] * 4 = 1.00794 * 2 + 32.065 + 15.9994 * 4 = 98.07848=98
Mr[Pb(OH)2] = Ar[Pb] + Ar[O] * 2 + Ar[H] * 2 = 207.2 + 15.9994 * 2 + 1.00794 * 2 = 241.21468=241
Объяснение: