Напишите кто восстановитель, а кто окислитель и сколько электронов отдает
1. Fe + 2 HCl = FeCl2 + H2
2. Fe + H2SO4 = FeSO4 + H2
3. 2H2 + O2 = 2H2O
4. 2H2O = 2H2 + O2
5. C +H2O = Co + H2
6. CuO +H2 = Cu +H2O
7. WO3 + 3H2 = W + 3H2O
8. H2 + S = H2S
9. H2 + Cl2 = 2HCl
10. H2 + N2 = H3N
11. Na + H2 = NaH
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