Feb 28-solutions - chauhan (mmc2762) Feb 28 sparks (51150)...

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Unformatted text preview: chauhan (mmc2762) Feb 28 sparks (51150) 1 This print-out should have 15 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. Preview sections 14.1-14.5. 001 (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. 3; 0; 0; 1 2. 4; 0; 0; 0 3. 2; 1; 0; 0 4. 0; 0; 1; 1 5. 1; 1; 0; 1 correct 6. None of these 7. 2; 0; 0; 2 8. 0; 2; 0; 0 9. 1; 0; 1; 0 10. 0; 1; 1; 0 Explanation: N has 5 valence electrons and O has 6 va- lence electron. The total number of valence electrons in the ion (plus one to account for the ions negative charge) is 5 + (2 6) + 1 = 18 The Lewis structure for NO 2 can be found by connecting the oxygen atoms to nitrogen and placing eight electrons around each atom: bracketleftbigg O b b b b b b b b N b b b b O b b b b b b bracketrightbigg and the central atom has one single bond, one double bond, and one unshared pair of electrons. 002 (part 2 of 2) 10.0 points Determine the molecular geometry of the ion NO 2 . 1. tetrahedral 2. None of these 3. octahedral 4. trigonal-planar 5. trigonal-pyramidal 6. bent or angular correct 7. trigonal-bipyramidal 8. linear Explanation: The central atom N has 2 bonding regions and 1 lone pair of electrons. The three areasand 1 lone pair of electrons....
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This note was uploaded on 04/03/2012 for the course CHEM 56920 taught by Professor Sparks during the Spring '12 term at University of Texas at Austin.

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Feb 28-solutions - chauhan (mmc2762) Feb 28 sparks (51150)...

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