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Last Name: First Name: Circle which section you are enrolled in : 8:00 section 9:00 section CH 310M/318M Fall 2004 Dr. Brian M. Bocknack Midterm Exam #2 – Answer Key Thursday, October 21, 2004 7:00–10:00 p.m. Do not open this exam booklet until you are told to do so! This exam is closed book, meaning no books, notes, calculators, or molecular models are allowed. PLEASE WRITE YOUR NAME AT THE TOP OF EACH PAGE!!! Exams written in pencil are not eligible for regrades. Answers written in pencil with ink overlay will not be graded. If you use a pen, only blue or black ink is acceptable. Be prepared to show your valid UT ID card to a proctor when you turn in your exam. Page Page Page 2 (20) 7 (27) 12 (18) 3 (16) 8 (18) 13 (18) 4 (23) 9 (28) 14 (15) 5 (16) 10 (20) 15 (25) 6 (16) 11 (10) 16 (30) Total (300) Including this cover page, 3 blank pages (scratch paper), and the last page, which contains a periodic table, this exam contains 20 pages. DO ALL QUESTIONS BEST OF LUCK!!!
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Last Name: First Name: 2 1. (Each part worth 4 points) In each part of this question, determine if the statement given is true or false . Circle your choice clearly!!! No explanation is required. (a) All molecules having tetrahedral carbon stereocenters are chiral. True False (b) If a molecule having a single tetrahedral carbon stereocenter is dextrorotatory, its absolute stereochemical configuration is ( R ). True False (c) Acid A has a pK a of 5.26. Acid X has a pK a of 8.41. The conjugate base of acid A is a weaker base than the conjugate base of acid X . True False (d) Consider the following reaction, in which curved arrows are used to indicate the movement of pairs of electrons: C O O H 3 C H O H H C O O H 3 C O H H H In this reaction, H 2 O acts as the electrophile. True False (e) Consider the two substituent groups shown below: SH C H H C O OH A B According to the Cahn–Ingold–Prelog priority rules, group A has a higher priority than group B . True False Page Total
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Last Name: First Name: 3 (f) Consider the alkenes shown below, which both have the molecular formula C 5 H 10 : A B CC H CH 3 H CH 3 CH 2 H 3 C H 3 C H CH 3 Alkane A has a more exothermic heat of formation than alkane B . T r u e F a l s e (g) The molecular formula of a compound is C 8 H 11 NO 2 . The structure of this molecule must include 4 double bonds. T r u e F a l s e Parts (h) and (i) both refer to the reaction energy diagram shown below: (h) This reaction is endothermic.
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This note was uploaded on 02/18/2010 for the course CHEMISTRY 310m taught by Professor Iverson during the Spring '08 term at University of Texas at Austin.

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exam2answers - Last Name: First Name: Circle which section...

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