CH223 HW3 - WebAssign Sunday, July 17 2011 05:06 PM EDT...

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Unformatted text preview: WebAssign Sunday, July 17 2011 05:06 PM EDT Logged in as cdbadger@ncsu Log out Home | My Assignments | Grades | Communication | Calendar Notifications | Help | My Options CH_223, section 651, Summer 1 2011 My Assignments CH223 HW 3 (Daily) Crystal Badger CH_223, section 651, Summer 1 2011 Instructor: Kay Sandberg Current Score : 10.5 / 14 Due : Sunday, May 29 2011 11:00 PM EDT Ask Your Teacher Extension Requests Print Assignment Question Points 1 2 3 4 5 6 7 8 0/1 0.38/1.5 3.63/5 1.25/1.25 1/1 1/1 1.25/1.25 2/2 Total 10.5/14 (75.0%) Description This assignment is corresponds mainly to Lecture 3. Instructions Be careful - for some multiple choice you only get one submission and on others you may get more than one submission, but you'll receive a point deduction if you do not get it correct on the first submission. Assignment Submission For this assignment, you submit answers by question parts. The number of submissions remaining for each question part only changes if you submit or change the answer. Assignment Scoring Your last submission is used for your score. The due date for this assignment is past. Your work can be viewed below, but no changes can be made. Important! Before you view the answer key, decide whether or not you plan to request an extension. Your Instructor may not grant you an extension if you have viewed the answer key. Automatic extensions are not granted if you have viewed the answer key. Request Extension 1. 0/1 points | Previous Answers My Notes Question Part Points Submissions Used 1 2 0/0.5 0/0.5 1/1 1/1 Total 0/1 a) The molecule in BOX A has a large dipole moment for a hydrocarbon. Which resonance structure best portraits why this would be so?1b C b) The molecule in BOX B also has a large dipole moment for a hydrocarbon. Which resonance structure best portraits why this would be so?2f E Solution or Explanation The resonance structure in which both rings possess a Huckel number of electrons is especially stable and thus will have this separation of charge in order to get a Huckel number in both rings. Separation of charge results in a dipole moment. Viewing Saved Work Revert to Last Response 2. 0.38/1.5 points | Previous Answers My Notes Question Part Points Submissions Used 1 2 3 0/0.5 0.38/0.5 0/0.5 2/2 2/2 2/2 Total 0.38/1.5 This question has some parts which are scored using special conditions. Question Parts 1, 2, 3: A deduction of 25% of the points for this question will be subtracted for each submission used beyond 1. Below is a molecule that possesses 2 aromatic rings fused together. The correction marks will not be shown for this question. a) Select the nitrogen(s) that possess a "true" lone pair....
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This note was uploaded on 07/17/2011 for the course CHEM 223 taught by Professor S during the Spring '10 term at N.C. State.

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CH223 HW3 - WebAssign Sunday, July 17 2011 05:06 PM EDT...

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