Расставьте коэффициенты в схемах реакций:

1. Al + S → Al2S3

2. K + H2O → KOH + H2↑

3. AgNO3+ CaCl2 → AgCl + Ca(NO3)2

4. Al + Cl2 → AlCl3

5. Al2(SO4)3 + KOH → Al(OH)3↓+ K2SO4

6. Al (OH)3 + HCl → AlCl3 + H2O

7. Fe2O3 + Al → Al2O3 + Fe

8. Mg + HBr → MgBr2 + H2↑

9. Fe(OH)3→ Fe2O3 + H2O

10. H2 + Br2→ HBr

11. CO + O2 → CO2

12. P + Cl2 → PCl5
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