exam 3 - CHEM 101, Spring 2006 Exam for 3rd Exam (April 18,...

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CHEM 101, Spring 2006 Exam for 3 rd Exam (April 18, 2005) 1. According to VSEPR theory, which one of the following molecules should be nonlinear ? A. CO 2 C. TeCl 2 B . SO 2 D. HCN 2. According to VSEPR theory, which one of the following molecules has a tetrahedral shape? A. NH 3 B. CCl 4 C. CO 2 D. SO 3 E. HCN 3. Which represents a valid Lewis structure for dinitrogen tetroxide, N 2 O 4 ? .. N N O O O O .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. N N O O O O A B .. .. .. .. N N O O O O .. .. .. .. .. .. N N O O O O C D 4. Sulfur atoms in the gas phase condense to form covalently bonded sulfur molecules via the reaction depicted below. Which statement about this process is true? 8S (g) S 8 (g) A. Energy is released as bonds are formed. B. Energy is required to form bonds. C. The energy of the reactants is the same as that of the products. D. Cannot tell from the information given. 5. The H-C-C angle in C 2 H 4 is: A. 90 ° B. 109 ° C. 120 ° D. 180 ° 6. For a particular process q = 20 kJ and w = 15 kJ at constant pressure. Which of the following statements is true? A. Heat flows from the system to the surroundings B. The system does work on the surroundings C. ∆E = 35 kJ D. All of the above are true 7. The ΔH fusion for sulfur is 17.7 kJ/mol. How many grams of sulfur can be melted by 29.0 kJ of energy?
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This test prep was uploaded on 04/21/2008 for the course CHEM 101 taught by Professor Rillings during the Spring '06 term at Clemson.

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exam 3 - CHEM 101, Spring 2006 Exam for 3rd Exam (April 18,...

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