7. Which charge(s) on an N₂ ion would give a bond order of 2.5?
(A) -2
(B) -1
(C) 0
(D) +1
(E) +2

8. Which nuclide undergoes beta decay? (A) (B) (C) (D) (E)

9. You are diluting an aqueous glucose solution. First, add 0.99 mL of water twice into a vial, and then add 100.0 uL of glucose solution. If the weight of the final solution is 2.1254 g, what is the correct expression for the solution density (g/mL)? (A) 1.021826 (B) 1.0218 (C) 1.021 (D) 1.02182 (E) 1.02

10. To a solution that is 0.01 M each in fluoride, sulfite, and phosphate ions is added dropwise a 1.00 M solution of CaCl2. In what order will solids precipitate? (A) First Ca3(PO4)2, then CaF2, last CaSO3 (B) First Ca3(PO4)2, then CaSO3, last CaF2 (C) First CaSO3, then, CaF2, last Ca3(PO4)2 (D) First CaF2, then CaSO3, last Ca3(PO4)2 (E) First CaF2, then Ca3(PO4)2, last CaSO3

11. Acetanilide (C6H5NHCOCH3, M=135.2 g/mole) can be prepared from aniline (C6H5NH2, M=93.1 g/mole) and acetic anhydride ([CH3CO]2O, M=102.1 g/mole) according to the balanced equation below. C6H5NH2 + [CH3CO]2O C6H5NHCOCH3 + CH3COOH If 5.0 g acetanilide is isolated from the reaction of 5.0 g aniline with 5.0 g acetic anhydride, what is the percent yield of the reaction? (A) 50.0% (B) 68.9% (C) 69.3% (D) 75.5% (E) 88.2%

12. What is ΔG for the decomposition of CaCO3 at 298 K and a partial pressure of CO2 of 2.00xbar? (A) -121 kJ mol-1 (B) 110 kJ mol-1 (C) 121 kJ mol-1 (D) 140 kJ mol-1 (E) 160 kJ mol-1

13. A 0.100 g sample of an alloy of copper and silver is dissolved in nitric acid to give a solution of and ions. This mixture is electrolyzed to redeposit all the metal ions as the elemental metals, requiring a current of 0.150 A for 1800 s. What's the mass percent of copper in the alloy? (Cu, M=63.5 g/mole, Ag, MW:107.9 g/mole) (A) 84.2% (B) 20.0% (C) 58.3% (D) 70.6% (E) 77.2%

14. In the following oxidation-reduction reaction and the oxidizing agent is (A) (B) (C) (D) Sn (E) NO2

15. Which of the following statements are true? A catalyst can act in chemical reaction to:I. Lower the activation energy.II. Change the equilibrium concentration of the products.III. Decrease the ΔE for the reaction.IV. Change the order of the reaction.V. Provide a new path for the reaction.(A) I, II, III (B) II and III (C) I and V (D) III and IV (E) II and V

16. Which C3H6O isomer has the highest boiling point? (A)(B) (C) (D) (E)

17. Which is a possible set of quantum numbers n, l, ml, ms for a valence electron of sulfur (S)? (A) 3, 2, 2, 1/2 (B) 3, 1, -1, 1/2 (C) 2, 1, 0, 1/2 (D) 3, 2, 0, -1/2 (E) 2, 1, 0, 1/2

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