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CH06_answers (1).pdf

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Department
Anthropology
Course
ANTH 1120
Professor
Avi Cohen
Semester
Fall

Description
Chapter 6 Answers Practice Examples 1a. 760.mmHg 3 1b. 1.13 g/cm 2a. 756.0 mmHg 2b. 93mm glycerol 3a. 139 torr 3b. 1.35 kg. It is not necessary to add a mass with the same cross sectional area. 4a. 24.4 LNH 3 4b. 464K 5a. 2.11molHe 5b. 5.59 × 1014 molecules N 2 6a. 2.11mL 6b. 0.378 g O 2 7a. 86.4g/mol 7b. 30.0 g/mol . This answer is in good agreement with the molar mass of NO. 8a. 0.162g/L . When compared to the density of air under the same conditions (1.16 g/L, based on the “average molar mass of air”=28.8g/mol) the density of He is only about one seventh as much. Thus, helium is less dense (“lighter”) than air. 8b. 32.0 g/mol 9a. 35.6 g NaN 3 9b. 0.619g Na(l) 10a. 1.25 L O 2 10b. 150. L NH 3 11a. 13atm 11b. 5.5atm Copyright © 2011 Pearson Canada Inc. 1 12a. 0.0348atmH O(g2 2.47atmCO (g) 2 . 12b. N 2 524 mmHg, O pressure =157 mmHg, CO = 0.27 mmHg,2Ar = 7.0 mmHg. 13a. 0.00278molHCl 13b. 0.382 L 14a. NH (3), 661m/s . 14b. 76.75K 15a. 2.110 4 mol O 2 15b. 28.2 s 16a. 1.9010 g/mol 16b. 52.3s 17a. Cl g 2bg 17b. Cl2bg Integrative Example A. C 3 4 There are three possible Lewis structures. B. C 4 9O 3 Exercises 1a. 0.968 atm 1b. 0.766 atm 1c. 1.17 atm 1d. 2.22 atm 3. 11.4 m benzene 5. 710 mm Hg -2 7. 1.03 kg cm 9a. 52.8 L 9b. 7.27 L Copyright © 2011 Pearson Canada Inc. 2 11. 225 K 13. 50.6 atm 15. 255 K 17. 0.132 g Ar 19a. 41.3 mg PH 3 19b. 7.3210 molecules 21. At the higher elevation of the mountains, the atmospheric pressure is lower than at the beach. However, the bag is virtually leak proof; no gas escapes. Thus, the gas inside the bag expands in the lower pressure until the bag is filled to near bursting. 23. 4.30 L 25. 4.89 g 27. 4 5.3210 mL 29. 702 g Kr 31. 2.110 11Pa -1 33a. 24.4 L·mol 33b. 31.3 L·mol -1 35. 103 g/mol 37. SF 4 39. 55.8 g/mol. The formula is CH4 8 . 41. 15.56 L/mol 43a. 1.18 g/L air 43b. The density of CO 2is 1.80 g/L CO 2. Since this density is greater than that of air, the balloon will not rise in air. 45. P 4 47. 378 L O 2 49. 3.110 L SO 2 Copyright © 2011 Pearson Canada Inc. 3 51. 10.9% KClO 3 53. 73.7 L H 2 55. 5.59 L gas 57. 2.0610 g Ne 59. The answer is (d). 61a. 842 mmHg 61b. Pbenzene 9.5 mmHg, Ar 752 mmHg. 63. Situation (b) best represents the resultingmixture, as the volume has increased by 50%. 65. 4.0 atm 67. 2.37 L H (g) 2 69. 751 mmHg 71. 17.9% 73. 326 m/s 75. 7.83 g/mol or 7.83u. 77. 1.5110 K3 21 79. 6.1710 J/molecule
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