Zadanie 3
3H2+N2--->2NH3
2Cu+O2--->2CuO
2FeO+C--->2Fe+CO2
Zadanie 4
1. 2Fe+3Cl2--->2FeCl3
2. 4Fe+3O2--->2Fe2O3
3. Fe+Br2--->FeBr2
4. 2Fe+O2--->2FeO