HW06 Quy - perlick (app582) HW06 quy (50970) This print-out...

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perlick (app582) – HW06 – quy – (50970) 1 This print-out should have 25 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 10.0 points A sigma bond 1. stems From sp hybridization oF orbitals. 2. may exist alone or in conjunction with a pi bond. correct 3. is composed oF non-bonding orbitals. 4. always exists in conjunction with a pi bond. 5. is always polar. Explanation: A sigma, or single bond can exist by itselF or with a pi bond, Forming a double bond. 002 10.0 points In a new compound, it is Found that the cen- tral carbon atom is sp 2 hybridized. This implies that 1. carbon is also involved in a pi bond. cor- rect 2. carbon has a tetrahedral electronic geom- etry. 3. carbon has Four sigma bonds. 4. carbon has Four lone pairs oF electrons. 5. carbon has Four regions oF high electron density. Explanation: Carbon Forms Four bonds. sp 2 hybridiza- tion enables a C atom to bond to three other atoms, leaving one electron in a p orbital, which will Form a pi bond. 003 10.0 points In the molecule, C 2 H 4 , what are the atomic orbitals that participate in Forming the sigma bond between the C and H atoms? 1. H: 1 s and C: sp 2 correct 2. H: 2 p and C: sp 3 3. H: sp 2 and C: sp 2 4. H: 1 s and C: 2 p 5. H: 1 s and C: sp Explanation: The electrons in the H 1 s orbital and the electrons in the C sp 2 hybrid orbital partici- pate in Forming the bond. 004 (part 1 of 4) 10.0 points Draw the Lewis structure For the Following hydrocarbon molecule. The carbons are num- bered one to Four starting with the Far leFt carbon as one. CH 2 CCHCH 3 What is the molecular shape oF carbon 3? 1. angular 2. trigonal pyramidal 3. trigonal planar correct 4. bipyramidal 5. square planar 6. tetrahedral 7. linear Explanation: The molecule has the structure C C C C Carbon 3 has bonds to two carbons and one hydrogen or RHED = 3. This is trigonal planar molecular geometry. 005 (part 2 of 4) 10.0 points What is the hybridization oF carbon 4?
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perlick (app582) – HW06 – quy – (50970) 2 1. sp 3 d 2 2. sp 2 3. sp 2 d 4. sp 3 d 5. sp 3 correct 6. sp 4 7. sp Explanation: The molecule has the structure C C C C Carbon 4 has bonds to one carbon and 3 hy- drogens or RHED = 4 which is sp 3 hybridized. 006 (part 3 of 4) 10.0 points What are the bond angles of carbon 2? 1. 109.5 2. 90 , 180 3. 120 4. 90 , 120 , 180 5. 90 , 120 6. less than 109.5 7. 180 correct Explanation: The molecule has the structure C C C C Carbon 2 has bonds only to two other carbons (double bonds). This is RHED = 2 or linear electronic geometry. Any linear molecule has 180 degree angles. 007 (part 4 of 4) 10.0 points
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This note was uploaded on 12/03/2011 for the course CH 301 taught by Professor Fakhreddine/lyon during the Fall '07 term at University of Texas at Austin.

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HW06 Quy - perlick (app582) HW06 quy (50970) This print-out...

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