162_AUT17_EXAM_1_practice_questions_KEY (1).pdf

162_AUT17_EXAM_1_practice_questions_KEY (1).pdf - CHEM 162...

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CHEM 162 PRACTICE QUESTIONS KEY EXAM 1 162 EXAM 1 PRACTICE QUESTIONS Page 1 of 20 1A 8A 1 H 1.00794 2A 3A 4A 5A 6A 7A 2 He 4.00260 3 Li 6.941 4 Be 9.01218 5 B 10.811 6 C 12.0107 7 N 14.00674 8 O 15.9994 9 F 18.9984 0 10 Ne 20.1797 11 Na 22.9898 12 Mg 24.3050 3B 4B 5B 6B 7B 8B 8B 8B 1B 2B 13 Al 26.9815 14 Si 28.0855 15 P 30.97376 16 S 32.066 17 Cl 35.4527 18 Ar 39.948 19 K 39.0983 20 Ca 40.078 21 Sc 44.9559 22 Ti 47.867 23 V 50.9415 24 Cr 52.996 25 Mn 54.9380 26 Fe 55.845 27 Co 58.933 28 Ni 58.693 29 Cu 63.546 30 Zn 65.39 31 Ga 69.723 32 Ge 72.61 33 As 74.9216 34 Se 78.96 35 Br 79.904 36 Kr 83.80 37 Rb 85.4678 38 Sr 87.62 39 Y 88.91 40 Zr 91.22 41 Nb 92.91 42 Mo 95.94 43 Tc (98) 44 Ru 101.07 45 Rh 102.91 46 Pd 106.42 47 Ag 107.8682 48 Cd 112.41 49 In 114.82 50 Sn 118.71 51 Sb 121.76 52 Te 127.60 53 I 126.9044 7 54 Xe 131.3 55 Cs 132.91 56 Ba 137.33 57 La 138.91 72 Hf 178.49 73 Ta 180.95 74 W 183.85 75 Re 186.21 76 Os 190.2 77 Ir 192.22 78 Pt 195.08 79 Au 196.97 80 Hg 200.59 81 Tl 204.38 82 Pb 207.19 83 Bi 208.98 84 Po (209) 85 At (210) 86 Rn (222) 87 Fr (223) 88 Ra 226.03 89 Ac (227) 104 105 106 107 108 109 Useful Constants: 1 atm = 760 mmHg = 760 torr R = 8.314 J/mol K = 0.08206 L atm/mol K ADDITIONAL INFORMATION N A = 6.02 x 10 23 𝐸𝐸 𝑃𝑃 𝜇𝜇 1 𝜇𝜇 2 𝑟𝑟 3 𝐸𝐸 𝑃𝑃 𝛼𝛼 1 𝛼𝛼 2 𝑟𝑟 6 𝐸𝐸 𝑃𝑃 | 𝑧𝑧 | 𝜇𝜇 𝑟𝑟 2 𝐸𝐸 𝑃𝑃 𝑄𝑄 1 𝑄𝑄 2 𝑟𝑟 𝐸𝐸 𝑃𝑃 𝜇𝜇 1 2 𝜇𝜇 2 2 𝑟𝑟 6 𝐸𝐸 𝑃𝑃 𝜇𝜇 1 2 𝛼𝛼 2 𝑟𝑟 6 from ln(P vap ) = - ∆H vap /RT + ∆S vap /T V sphere = 4/3πr 3 V cube = e 3 d = m/V z 2 = x 2 + y 2 Henry’s constants mol/L . atm Air 7.9 x 10 -4 Argon 1.5 x 10 -3 Helium 3.7 x 10 -4 Hydrogen 8.5 x 10 -4 Nitrogen 7.0 x 10 -4 Oxygen 1.3 x 10 -3 Molal boiling pt elevation & freezing pt depression constants Boil pt o C K b o C kg/mol Freeze pt o C K f o C kg/mol Water 100.0 0.51 0. 1.86 CCl 4 76.7 5.03 -22.99 30. Benzene 80.1 2.53 5.5 5.12 Camphor 208.0 5.95 179.8 40.
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CHEM 162 PRACTICE QUESTIONS KEY EXAM 1 162 EXAM 1 PRACTICE QUESTIONS Page 2 of 20 1. (CH 6) Calcium metal occurs in both the face-centered cubic and body-centered cubic crystal structures. Which would have the greater density? a. the fcc structure is more dense because its packing efficiency is greater than that of the bcc structure b. the bcc structure is more dense because its packing efficiency is greater than that of the fcc structure c. the fcc structure is more dense because its packing efficiency is less than that of the bcc structure d. the bcc structure is more dense because its packing efficiency is less than that of the fcc structure 2. (CH6) A solid that consists of atoms covalently bonded to their neighbors throughout the extent of the solid is categorized as a a. Network solid b. Molecular solid c. Metallic solid d. Ionic solid 3. (CH 6) The triple point on a phase diagram represents the temperature and pressure at which a. The 3 phases, solid, liquid, and gas, coexist b. A supercritical fluid forms c. The vapor phase is as dense as the liquid phase d. A and B e. B and C 4. (CH 6) Which of the substances below will have the lowest viscosity? a. Ethanol (CH 3 -CH 2 -O-H) at 30 o C b. Ethanol (CH 3 -CH 2 -O-H) at 5 o C c. Glycerol (CH 3 -CH 2 -CH 2 -O-H) at 30 o C O-H O-H d. Glycerol (CH 3 -CH 2 -CH 2 -O-H) at 5 o C O-H O-H THE SET OF QUESTIONS BELOW DO NOT REPRESENT AN ACTUAL EXAM BUT ARE TYPICAL OF EXAM QUESTIONS. THE FORMAT OF THE ACTUAL EXAM WILL INCLUDE FEWER QUESTIONS AND MAY INCLUDE OTHER TOPICS THAN REPRESENTED IN THE QUESTIONS BELOW.
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