8. Which type of spherical packing has the most unused space?
(A) body-centered cubic
(B) cubic closest-packed
(C) cubic closest-packed and hexagonal closest-packed
(D) simple cubic

4. Air has an average molar mass of 29.0 g/ mol. The density of air at 1.00 atm and 30°C is (A) 29.0g/L (B) 40.0g/mL (C) 1.17g/L (D) 1.29g/L (E) 12g/L

5. Consider the following gas samples:Which one of the following statements is false? (A) The volume of sample A is twice the volume of sample B. (B) The average kinetic energy of the molecules in sample A is twice the average kinetic energy of the molecules in sample B. (C) The fraction of molecules in sample A having a kinetic energy greater than some high fixed value is larger than the fraction of molecules in sample B having kinetic energies greater than that same high fixed value. (D) The mean square velocity of molecules in sample A is twice as large as the mean square velocity of molecules in sample B. (E) Assumning identical intermolecular forces in the two samples, sample A should be more nearly ideal than sample B.

6.Consider the following ground state electron configuration: 1s22s22p4. Which of the ions has this ground state electron configuration? (A) (B) (C) (D)

7. Which ionization process requires the most energy? (A) (B) (C) (D)

9. What is the edge length of a face-centered cubic unit cell made up of atoms having a radius of 200 pm? (A) 71 pm (B) 566 pm (C) 20 pm (D) 110 pm

10.KBr crystallizes in a cubic unit cell with Br ions on each corner and each face. How many ions and ions are in each unit cell of KBr? (A) 1 ion and 1 ion (B) 2 ions and 2 ions (C) 4 ions and 4 ions (D) 8 ions and 8 ions

11.Which should be least soluble in water? (A) (B) (C) (D)

12.A solution is prepared by dissolving 17.75 g sulfuric acid, H2SO4, in enough water to make 100.0 mL of solution. If the density of the solution is 1.1094 g/mL, what is the molality? (A) 0.1775m H2SO4 (B) 0.1810 m H2SO4 (C) 1.810 m H2SO4 (D) 1.940 m H2SO4

13.n general, as the temperature increases, the solubility of gases in water ______ and the solubility of most solids in water ______. (A) decreases, decreases (B) decreases, increases (C) increases, decreases (D) increases, increases

14.A solution is prepared by dissolving 20.0 g of sucrose, in 250. g of water at 25°C. What is the vapor pressure of the solution if the vapor pressure of water at 25°C is 23.76 mm Hg? (A) 0.198 mm Hg (B) 20.5 mm Hg (C) 23.7 mm Hg (D) 24.0 mm Hg