Midterm 2 - Key

Midterm 2 - Key - Name_ Section and Computer Number_...

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Name____________________________________ Section and Computer Number__________________________ Instructor: Meadows Winter 09 CHEMISTRY 124 Exam IIa Instructions: CLOSED BOOK EXAM ! No books, notes, or additional scrap paper are permitted. All information required is contained on the exam. Place all work in the space provided. If you require additional space, use the back of the exam. (1) Read each question carefully. (2) The last page contains a periodic table and some useful information. You may remove this for easy access. (3) Graded exams will be returned in lab sections next week. (4) Use CORRECT SIGNIFICANT FIGURES. (5) Show all work for partial credit. Answers without supporting calculations will be considered incorrect. Good Luck! Possible Points Points Multiple Choice (39 points) 14-15 (21 points) 16-17 (14 points) 18 (18 points) Total: 92
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Part I: Multiple Choice (3 pts. Each) Identify and circle the correct answers on your exam-no partial credit. Choose the answer that most closely matches your calculations. 39 Points 1. Which of the following would be a valid set of quantum numbers for the last electron added in an atom of Zr? A. n= 5, l= 1, m l = 0, m s = +1/2 B. n= 4, l= 3, m l = -2, m s = -1/2 C. n= 5, l= 2, m l = 0, m s = +1/4 D. n= 5, l= 2, m l = -1, m s = -1/2 E. n= 4, l= 0, m l = 0, m s = +1/2 2. The following reaction can be assumed to be: COS (g) + 3H 2 O (g) SO 2 (g) + CO 2 (g) + 3H 2 (g) H ° = 177.8 kJ/mol A. endothermic, increasing in entropy, and temperature-dependent spontaneity B. endothermic, increasing in entropy, and temperature-independent spontaneity
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This note was uploaded on 06/15/2010 for the course CHEM 124 taught by Professor Hascall during the Winter '08 term at Cal Poly.

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Midterm 2 - Key - Name_ Section and Computer Number_...

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