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Unformatted text preview: 1 Chemistry 140A NAME: (please print)___ Answer Key ____________ Professor Jerry Yang First Last Sp10, Examination #1 April 20 th , 2010 Signature:___________ Version 1 _______________ PID #:_____________________________________ I give Professor Yang permission to leave my graded exam outside the elevators on the 6 th floor of Pacific Hall for pickup: Signature _______________________________ WRITE YOUR NAME AT THE TOP OF EVERY PAGE! USE NON-ERASABLE INK ONLY! Write the name of the person sitting: To your right_____________________ To your left _____________________ DO NOT OPEN YOUR EXAM UNTIL YOU ARE TOLD. Please write the answers you want graded in the space provided. Do scratch work on the backs of the pages. The test should have 8 numbered pages. Check to make sure you have received a complete exam. A good piece of advice: Read carefully over the questions at least twice; Make sure that you understand exactly what is being asked; avoid sloppy structures or writing. Good Luck! DO NOT WRITE BELOW THIS LINE I. ___________ (15) IV. ___________ (16) II. ___________ (15) V. ___________ (20) III. ___________ (14) VI. ___________ (20) Total ___________ (100) 2 I. [15 points] NAME: (please print)__________________________ First Last Draw the most and least acidic isomer of C 3 H 8 O Most acidic isomer of C 3 H 8 O Least acidic isomer of C 3 H 8 O a. OH OH or either is acceptable O Draw the structure and least stable staggered conformation of 1,1,2-tribromoethane along the C 1-C 2 axis. (Label the carbons as C 1 and C 2 in both of your answers). in both of your answers)....
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- Fall '10