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Unformatted text preview: scrushy (mgs972) Oct 6 HW sparks (50975) 1 This print-out should have 13 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. Preview sections 5.1-5.4 before Tuesdays class. 001 10.0 points What is the geometry around the leftmost carbon in the molecule CH 2 CHCH 3 ? 1. trigonal planar correct 2. tetrahedral 3. square planar 4. linear 5. trigonal pyramidal Explanation: 002 10.0 points Consider the compound peroxyacetylni- trate, an eye irritant in smog. O N C O O O O H 3 C O Predict the indicated bond angle. 1. 109.5 2. 90 3. 60 4. 30 5. 120 correct Explanation: There are 46 valence electrons; the struc- ture does not show lone pairs on the O atoms nor the C H bonds. There will be three lone pairs on the terminal O singly bonded to N, and two lone pairs on all other O atoms. The indicated atom has RHED = 3, so the bond angle will be 120 . 003 10.0 points Antibonding orbitals 1. lend instability to a molecule when popu- lated with electrons. correct 2. are responsible for high ionization ener- gies in atoms. 3. are responsible for dipole moments in molecules. 4. are higher in energy than bonding orbitals and are therefore populated with electrons prior to bonding orbitals. 5. are lower in energy than bonding orbitals and are therefore populated with electrons prior to bonding orbitals....
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This note was uploaded on 10/18/2011 for the course CHEMISTRY 301 taught by Professor Mccord during the Fall '10 term at University of Texas at Austin.
- Fall '10