Geometries McCord

# Geometries McCord - hacopian(eh7969 – H06 Geometries –...

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Unformatted text preview: hacopian (eh7969) – H06: Geometries – Mccord – (52385) 1 This print-out should have 24 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Consider a 3-atom molecule A B A for which B has a total of only four valence elec- trons – enough to make two bonds. Predict the A-B-A bond angle. 1. 180 ◦ 2. 60 ◦ 3. 120 ◦ 4. 109.5 ◦ 5. 90 ◦ 002 10.0 points What is the shape of COCl 2 ? 1. trigonal pyramidal 2. tetrahedral 3. trigonal planar 4. seesaw 5. T-shaped 003 10.0 points Which of the following has bond angles slightly LESS than 120 ◦ ? 1. O 3 2. I − 3 3. SO 3 4. SF 2 5. NO − 3 004 (part 1 of 2) 10.0 points Draw the Lewis structure for NO − 2 . How many single bonds, double bonds, triple bonds, and unshared pairs of electrons are on the central atom, in that order? 1. 0; 0; 1; 1 2. 3; 0; 0; 1 3. 1; 0; 1; 0 4. 2; 0; 0; 2 5. 0; 2; 0; 0 6. 0; 1; 1; 0 7. None of these 8. 1; 1; 0; 1 9. 2; 1; 0; 0 10. 4; 0; 0; 0 005 (part 2 of 2) 10.0 points Determine the molecular geometry of the ion NO − 2 . 1. None of these 2. trigonal-pyramidal 3. trigonal-planar 4. bent or angular 5. linear 6. octahedral 7. trigonal-bipyramidal 8. tetrahedral...
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Geometries McCord - hacopian(eh7969 – H06 Geometries –...

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