A. Complete and balance the following combination reactions.
1. Carbon + Oxygen 
2. Sulfur + Carbon 
3. Nitrogen + Hydrogen 
4. Hydrogen + Oxygen 
5. Sulfur + Hydrogen 
6. Sulfur + Oxygen 
7. Phosphorus + Chlorine 
8. Silicon + Oxygen 
9. Carbon + Silicon 
10. Potassium + Bromine 
11. Sodium + Oxygen 
12. Aluminum + Iodide 
13. Iron + Sulfide 
14. Zinc + Fluoride 
15. Carbon monoxide + Oxygen 
16. Sulfur dioxide + Oxygen 
17. Diphosphorus trioxide + Oxygen 
18. Nitrogen monoxide + Oxygen 
19. Carbon dioxide + Water 
20. Sulfur trioxide + Water 
21. Potassium oxide + Water 
22. Iron(III) oxide + Water 
23. Tetraphosphorus decoxide + Water 
24. Nitrogen dioxide + Water 
25. Calcium oxide + Water 