| 1. 3 | 7. 4 | 13. 4 |
| 2. 2 | 8. 3 | 14. 3 |
| 3. 4 | 9. 4 | 15. 1 |
| 4. 4 | 10. 2 | 16. 2 |
| 5. 1 | 11. 4 | 17. 2 |
| 6. 4 | 12. 3 | 18. 1 |
19. coefficients are 1,2,2
20. fermentation, decomposition
21. decomposition, redox
22. the mass of the reactants equals the mass of the products
23. 4, half of 8
24. there should be 4 black and white molecules and 1 all white molecule
25. coefficients are 1, 8, 5, 6
26. a. 5 ÷ 8 = x ÷ 6 b. 3.75
27. 16 moles 2 x 8
28. N2 = 14.0(2)
H4 = 1.0(4)
C = 12.0 and 16.0(3) 96.0 g
29. 11 ÷ 44 = .25 mol
30. 8.40 g / 58.3 g per mol
31. 0.050 ÷ 2 = 0.025 mol
32. NaHCO3