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Part II. Multiple choice, continued (3 points each). Name:__________________ Please circle your answer. There is only one correct answer to each question. 52. A mixture of He and Ne at a total pressure of 0.95 atm is found to contain 0.32 mol of He and 0.56 mol of Ne. The partial pressure of Ne is __________ atm. A) 0.60 B) 1.5 C) 1.0 D) 0.35 53. Of the following gases, _____________ will have the greatest rate of effusion at a given temperature. A) NH3 B) CH4 C) Ar D) HCl 54. Which noble gas is expected to show the largest deviations from the ideal gas behavior? A) helium B) neon C) argon D) krypton 55. Together, liquids and solids constitute _______ phases of matter. A) the compressible B) the fluid C) the condensed D) the disordered 56. What is the predominant intermolecular force in liquid CBr4? A) dispersion B) dipole-dipole C) ion-dipole D) hydrogen bonds 57. Of the following substances, ____________ has the highest boiling point. A) H2O B) CO2 C) CH4 D) Kr 58. Of the following substances, ____________ has the lowest boiling point. A) Kr B) Ar C) Ne D) Xe 59. What is the predominant intermolecular force in liquid HBr? A) dispersion B) dipole-dipole C) ion-dipole D) hydrogen bonds 60. The total pressure of a mixture of O2 and N2 is 730 torr. The partial pressure of N2 is 0.78 atm. The partial pressure of O2 is A) 0.18 atm B) 0.22 atm C) 0.26 atm D) 0.78 atm

Part II. Multiple choice, continued (3 points each). Name:__________________ Please circle your answer. There is only one correct answer to each question. 43. The F-N-F bond angle in the NF3 molecule is slightly less than ___________. A) 90˚ B) 109.5 ˚ C) 120˚ D) 180˚ 44. The angles between sp2 orbitals are _____________. A) 90˚ B) 109.5˚ C) 120˚ D) 180˚ 45. The blending of one s atomic orbital and two p atomic orbitals produces __________. A) three sp hybrid orbitals B) three sp2 hybrid orbitals C) three sp3 hybrid orbitals D) two sp3 hybrid orbitals 46. The π bond in ethylene, CH2CH2, results from the overlap of ___________. A) sp3 hybrid orbitals B) s atomic orbitals C) sp2 hybrid orbitals D) p atomic orbitals 47. The amount of gas that occupies 60.82 L at 31˚ C and 367 mm Hg is _________ mol. A) 1.18 B) 0.850 C) 894 D) 11.6 48. The specific heat of lead is 0.13 J/g-K. How much heat (in J) is required to raise the temperature of 15 g of lead from 22 ˚C to 37 ˚C? A) 7.8 B) 1.9 C) 19 D) 29 49. Which one of the following is a weak acid? A) HNO3 B) HI C) HF D) HClO4 50. Which combination will produce a precipitate? A) NH4OH (aq) and HCl (aq) B) AgNO3 (aq) and Ca(C2H3O2)2 (aq) C) NaCl(aq) and HC2H3O2 (aq) D) NaOH (aq) and Fe(NO3)2 (aq) 51. The density of chlorine (Cl2) gas at 25 ˚C and 450 torr is _______ g/L. A) 20 B) 4.9 C) 1.7 D) 0.86