Exam02answers pg2 - bonds. This extends over 12 carbons....

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2. 90 3. 120 4. 109.5 5. 150 Explanation: 005 (part 1 of 1) 10 points What hybridization would you expect for the carbon atoms in the cyclic compound benzene (C 6 H 6 )? 1. sp 2 correct 2. sp 3 3. sp 3 d 2 4. sp 3 d 5. sp Explanation: In each carbon one s orbital and two p or- bitals hybridize to produce three sp 2 orbitals which form sigma bonds between the carbons and between carbon and hydrogen. The re- maining p orbitals form pi bonds between the carbons. 006 (part 1 of 1) 10 points Which of the following compounds is polar? 1. CO 2 2. CH 3 Cl correct 3. CH 4 4. NO - 3 5. CCl 4 Explanation: CH 3 Cl is not a symmetric molecule. The polar C Cl bond is not canceled by the C H bonds. All other choices are symmetric and therefore any polar bonds will cancel. 007 (part 1 of 2) 10 points An organic molecule has a section in it con- sisting of alternating double and single carbon
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Unformatted text preview: bonds. This extends over 12 carbons. The molecular orbital calculations yield 12 or-bitals for this section (some bonding some an-tibonding). One of these orbitals is labeled 3 and is degenerate with two other orbitals. What is the maximum number of electrons that can be Ft into this one particular or-bital? 1. 4 2. 1 3. 12 4. 3 5. 6 6. 2 correct Explanation: All orbitals, no matter what type, can only hold 2 electrons. 008 (part 2 of 2) 10 points What would be the number of antibonding orbitals ( s ) in this system? 1. 6 correct 2. 2 3. 12 4. 4 5. 1 6. 3 Explanation: You will get one antibonding for every bonding orbital. This means that the 12 total will be 6 bonding and 6 antibonding orbitals....
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