Prac Final - Chemistry 108 Practice Final 1. The boiling...

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1 Chemistry 108 Practice Final 1. The boiling point of HCl( l ) is higher than the boiling point of Ar( l ) as a result of (a) hydrogen bonding (b) higher formula mass (c) stronger London forces (d) permanent dipole forces (e) ion-ion forces 2. Which of the following truly describes the atmosphere? (a) Temperature increases in regular way with increasing altitude. (b) Pressure increases in a regular way with increasing altitude. (c) Concentrations of all major air pollutants increase in a regular way with increasing altitude. (d) Temperature decreases in a regular way with increasing altitude (e) Pressure decreases in a regular way with increasing altitude. 3. Which of the following molecules will have the largest dipole moment? (a) CS2 (b) SF6 (c) XeF2 (d) BF3 (e) OF2 4. Which of the following substances has the strongest intermolecular attractions? (a) He, boiling point ! 268.6 ° C (b) Ne, boiling point ! 245.9 ° C (c) Ar, boiling point ! 185.7 ° C (d) Kr, boiling point ! 152.3 ° C (e) All have equally strong intermolecular attractions. 5. The molecular shape of AsF5 is expected to be (a) trigonal bipyramidal (b) T-shaped (c) octahedral (d) tetrahedral (e) square planar 2 6. What is the predominant intermolecular force in carbon tetrachloride, CCl4? (a) London dispersion force (b) ion-dipole attraction (c) ionic bonding (d) dipole-dipole attraction (e) hydrogen-bonding 7. Given the following samples of gases N2 N2 O2 N2 1.0 atm 0.5 atm 1.0 atm 0.5 atm 0 ° C 0 ° C 0 ° C 20 ° C I II III IV Which of the following statements are false ? 1. I and II have the same average kinetic energy. 2. II and IV have the same average kinetic energy. 3. I has a higher average speed than III. 4. I has a higher average speed than II. (a) 1 and 2 are false (b) 1 and 3 are false (c) 1 and 4 are false (d) 2 and 3 are false (e) 2 and 4 are false 8. Place the following in order of increasing first ionization energy F, O, Ne, Cs, Rb, Fe. (a) F < O < Ne < Cs < Rb < Fe (b) Fe < Ne < O < F < Cs < Rb (c) Cs < Rb < Fe < O < F < Ne (d) Ne < Fe < Cs < Rb < O < F (e) Cs < Rb < O < Fe < F < Ne
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3 9. Which one of the following species has as many electrons as it has neutrons? (a) 1 H (b) 40 Ca 2+ (c) 14 C (d) 19 F ! (e) 35 S 2 ! 10. A real gas, such as CO 2 , is expected to show ideal behavior (a) when a liquid is present. (b) at low temperature. (c) at high pressure and low temperature. (d) at low pressure and high temperature. (e) at high pressure. 11. The balanced homogeneous vapor-phase reaction G + H Q + Z has Kc = 5.3 x 10 ! 4 . At equilibrium (a) products dominate. (b) reactants dominate. (c) approximately equal molar amounts of reactants and products are present. (d)
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This note was uploaded on 07/23/2008 for the course CHEM 108 taught by Professor Bojan during the Spring '07 term at Penn State.

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Prac Final - Chemistry 108 Practice Final 1. The boiling...

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