Объяснение:
а)2Al + 6HCl = 2AlCl3 + 3H2
б)3Ca(OH)2 + 2H3PO4 = Ca3(PO4)2 + 3H2O
в)4Al + 3O2=2Al2O3.
г)2Cu(NO3)2 = 2CuO + 4NO + 3O2
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Объяснение:
а)2Al + 6HCl = 2AlCl3 + 3H2
б)3Ca(OH)2 + 2H3PO4 = Ca3(PO4)2 + 3H2O
в)4Al + 3O2=2Al2O3.
г)2Cu(NO3)2 = 2CuO + 4NO + 3O2