Объяснение:

1) Fe + Cl₂ = FeCl₂

2) 2Na + Cl₂ = 2NaCl

3) 2Ag + S = Ag₂S

4) 4Al + 3O₂ = 2Al₂O₃

5) 2HgO = 2Hg + O₂

6) 4Na + O₂ = 2Na₂O

7) 2Ca + O₂ = 2CaO

8) 2Zn + O₂ = 2ZnO

9) см. 5)

10) 2C + O₂ = 2CO

11) 2N₂ + 5O₂ = 2N₂O₅

12) 2Cu + O₂ = 2CuO

1. Ca₃N₂ + 6H₂O = 2NH₃ + 3Ca(OH)₂

2. 9C + 2Al₂O₃ = Al₄C₃ + 6CO

3. 2NH₃ + H₃PO₄ = (NH₄)₂HPO₄

4. Cu(NO₃)₂ = CuO + 2NO₂ + O₂

5. PCl₅ + 4H₂O = H₃PO₄ + 5HCl

6. 4K₂SO₃ = K₂S + 3K₂SO₄

7. 2NO₂ + 2NaOH = NaNO₃ + NaNO₂ + H₂O

8. Mg₃N₂ + 6H₂O = 3Mg(OH)₂ + 2NH₃

9. 2C₆H₆ + 15O₂ = 12CO₂ + 6H₂O

10. 2Ca₃(PO₄)₂ + 6SiO₂ = 6CaSiO₃ + 2P₂O₅

11. 2Al + 3CuSO₄ = Al₂(SO₄)₃ + 3Cu