1. Ag + H 2 S  Ag 2 S + H 2 Ag-Ag- H-H- S-S-

2. 2Ag + H 2 S  Ag 2 S + H 2

3. H 2 + O 2  H 2 O H-H- O-O-

4. 2H 2 + O 2  2H 2 O

5. CuO + C  Cu + CO 2 Cu-Cu- O-O- C-C-

6. 2CuO + C  2Cu + CO 2

7. H 2 O 2  H 2 O + O 2 H-H- O-O-

8. 2H 2 O 2  2H 2 O + O 2

9. SO 2 + O 2 + H 2 O  H 2 SO 4 S-S- O-O- H-H-

10. 2SO 2 + O 2 + 2H 2 O  2H 2 SO 4

11. CuO + H 2 SO 4  CuSO 4 + H 2 O Cu-Cu- O-O- S-S- H-H-

12. CuO + H 2 SO 4  CuSO 4 + H 2 O

13. Fe + O 2  Fe 2 O 3 Fe-Fe- O-O- WATER

14. 4Fe + 3O 2  2Fe 2 O 3

15. SO 2 + O 2  SO 3 O-O- S-S-

16. 2SO 2 + O 2  2SO 3

17. P 4 O 10 + H 2 O  H 3 PO 4 P-P- O-O- H-H-

18. P 4 O 10 + 6H 2 O  4H 3 PO 4