HW5answers - Cheung Anthony – Homework 5 – Due midnight...

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Unformatted text preview: Cheung, Anthony – Homework 5 – Due: Oct 13 2006, midnight – Inst: McCord 1 This print-out should have 24 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. 001 (part 1 of 1) 10 points The VSEPR theory is based on 1. the loss and gain of electrons based on electronegativity. 2. the neutralization of ionic charge in a molecule. 3. the minimization of repulsion among va- lence electron pairs. correct 4. the arrangement of v core electrons in a molecule. Explanation: VSEPR stands for Valence Shell Electron Pair Repulsion and it describes the position of electron pairs around an atom, allowing us to predict their molecular shapes. 002 (part 1 of 1) 10 points Which of the following molecules is not lin- ear? 1. O 3 correct 2. N 2 3. Cl 2 4. CO 2 5. None of the answers is correct. Explanation: O O O is bent. 003 (part 1 of 2) 10 points What is the shape of the ClO- 3 ion? 1. octahedral 2. trigonal bipyramidal 3. trigonal planar 4. trigonal pyramidal correct 5. square pyramidal 6. tetrahedral Explanation: The resonant Lewis structures are Cl O O O - Cl O O O - Cl O O O - The chlorate ion is trigonal pyramidal. 004 (part 2 of 2) 10 points What values are expected for the O- Cl- O bond angles? 1. 209.5 ◦ 2. 129.5 ◦ 3. 145.5 ◦ 4. 100.5 ◦ 5. 109.5 ◦ correct 6. 180.0 ◦ Explanation: All of the oxygen atoms are equivalent (res- onance forms) so there should be only one O- Cl- O bond angle value; it is close to 109.5 ◦ ....
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HW5answers - Cheung Anthony – Homework 5 – Due midnight...

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