Exam109_answers - Exam#1 Chemistry 2401(12 I Fill in the blanks with a number A A sodium ion(Na with a mass number of 23 contains_11 protons_10

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C C C C O H H H H H H C C N C O H H H H H C N N H H CH 3 C O CH 2 CH 3 C O CH 2 CH 2 CH O CH 2 CH 3 CH 2 CH O CH 2 CH 3 C CH CH CH 3 CH 3 CH 2 CH CH 3 CH 3 OH CH 2 O CH 2 CH 3 CH 3 isobutanol Exam #1 Chemistry 2401 – September 22, 2009 (12) I. Fill in the blanks with a number. A. A sodium ion (Na + ) with a mass number of 23 contains _ 11 _ protons, _ 10 _ electrons and _ 12 __ neutrons. B. A nitrogen atom in an organic molecule that has no formal charge has _ 3 _ bonds and _ 1 __ nonbonded electron pairs. A nitrogen atom in an organic molecule that has a formal charge of +1 has _ 4 _ bonds and_ 0 _ nonbonded electron pairs. C. A compound, C 10 H 14 O, contains a double bond, a ring and a triple bond. How many π bonds does a molecule of this substance contain? _ 3 __ D. In diamond each carbon atom forms _ 4 _ bonds to other carbon atoms around it. E. The number of outer (valence) shell electrons in an atom of phosphorus (at # 15) is _ 5 _. The number of these electrons that occupy orbitals by themselves is _ 3 __. F. What is the approximate C-O-C bond angle in dimethyl ether (right)? _ 109 __ (29) II. Draw structural formulas for each of the following. For some a skeleton is provided to assist you. A. The conjugate base of B. The conjugate acid of the amino acid, leucine: This is leucine. the amino acid, leucine: CH C O OH NH 2 CH 2 CH CH 3 CH 3 OH ? H 3 O ?
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This note was uploaded on 03/06/2012 for the course CHEMISTRY 90262 taught by Professor Mccord during the Spring '09 term at University of Central Arkansas.

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Exam109_answers - Exam#1 Chemistry 2401(12 I Fill in the blanks with a number A A sodium ion(Na with a mass number of 23 contains_11 protons_10

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