nov%202008

nov%202008 - Chemistry 1050 November Test, 2008-09 Page 1...

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Chemistry 1050 November Test, 2008-09 Page 1 Before starting the exam, be sure that you have correctly entered: d Your student number d The exam code on the front cover 1. An oxide of nitrogen is found to contain 36.8% nitrogen by mass. What is the empirical formula of the oxide? A) N 2 O 3 B) NO 2 C) N 2 O D) NO E) N 2 O 5 2. A solution of H 2 SO 4 has a pH of 1.60. What is molarity of the H 2 SO 4 solution? A) 1.60 M B) 0.0502 M C) 0.0126 M D) 0.0251 M E) 0.0160 M 3. Glucose (C 6 H 12 O 6 ) is the most common six-carbon sugar. If an aqueous solution of glucose has a density of 1.65 g mL 1 and is 32.7% glucose by weight, what is the molarity of the glucose solution? A) 5.05 B) 1.82 C) 0.540 D) 3.00 E) 3.27
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Chemistry 1050 November Test, 2008-09 Page 2 4. Natural Sb consists of two isotopes, 121 Sb (120.904 amu) and 123 Sb (122.904 amu). Calculate the percent abundance of the heavier of the two isotopes. A) 15 B) 75 C) 50 D) 45 E) 25 5. Calcium carbonate, CaCO 3 , is the active ingredient in many over-the-counter antacid preparations. It reacts with acid according to the equation below. How many grams of CaCO 3 would be required to raise the pH of a 1.60 L solution from pH 1.50 to 2.60? CaCO 3 + 2 H + H 2 CO 3 + Ca 2+ A) 4.66 B) 9.32 C) 6.35 D) 12.7 E) 2.33 6. Which one of the following ground-state pairs of species is isoelectronic? A) O and S B) Ne and Kr C) K and Ca + D) Li and Na E) Cr and Cu
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Chemistry 1050 November Test, 2008-09 Page 3 7. What is the ground-state electronic configuration of the Cu + ion? A) [Kr] 4 s 2 3 d 8 B) [Kr] 3 d 9 C) [Kr] 4 s 2 3 d 9 D) [Kr] 4 s 1 3 d 9 E) [Kr] 3 d 10 8. At each principal quantum number of n = 2 and above, there is a set of three atomic orbitals that are degenerate . What is correct about this set of orbitals?
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This note was uploaded on 04/12/2011 for the course BIO 1222 taught by Professor Maxwell during the Spring '08 term at UWO.

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nov%202008 - Chemistry 1050 November Test, 2008-09 Page 1...

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