450
Answers to Problems of the A Groups
16. 46.00%
17. Answers to these problems are given on p 443.
4. 84.65°C
5. 169 g/mole
6. S 8
7. C 8 H 10 0 2
8. C 10 H 6 N 2 0 4
9. 48.6
CHAPTER 21
1. (a) 5.12°C
(b) 0.36°C
(c) 0.928
(d) 92.8 torr
(e) 82.68°C
2. 98.5 g/mole
3. -0.604°C
10. (a) m = 1.21, mole fraction = 0.0213
(b) m = 2.92, mole fraction = 0.149
(c) m = 1.30, mole fraction = 0.0564
(d) m = 0.333, mole fraction = 0.00596
(e) m = 4.39, mole fraction = 0.255
11. 13.9 qt
12. 45.45 g in one beaker,
204.55 g in the other
13. 6.2 torr
14. The apparent mole weight of 121.8 in water indicates a very slight dissociation into
benzoate and H
+ ions. The apparent molecular weight of 244 in benzene indicates a
polymerization into a compound with the formula (C 7 H 6 O 2 ) 2 .
15. 41.1 atm
16. 3.51 x 10
4 g/mole
17. 51 units
18. 20.9 torr
19. 2.15%
CHAPTER 22
1. (a) 4
(b) 6
(c) 8
(d) -1
(e) 1.92
20. 79.0%
21. -0.0194°C
22. 78.5%
23. 91.6%
(f) 1.05
(g) 4.43
(h) 7.19
(i) -0.54
C) 0.30