CHM Fall 2009 Exam 1

CHM Fall 2009 Exam 1 - .§6A N " Chem 201 Name:...

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Unformatted text preview: .§6A N " Chem 201 Name: Exam 1 y L00 1. What is the most electronegative element? The second and third? 2. What is the least electronegative element? 3. Reproduce the top two rows of the periodic table giving the number of bonds each element l \ likes to form. __ 0 l L 3 q 3.11, t \h H B C— N‘JO F Na 4. Naming. Provide the common name for the compounds below. 0&1 CHOU“) 6 aHrandk - - r alga if 1‘ L HgNMNHz HZN L b1 NHz i/\o/\L / WW buhl [dimEEf <11 33d“ 5. Which of the following acids could be the strongest? Which is probably the weakest? if you're stuck between 2, explain why. 0 O Jk _ F 0 F304 OH AOH 3 OOH ( / l HA?) “(5 (M 7%“ Wt! In" 9h”? ‘- Hz. ltslv 6. More naming. What is the systematic (IUPAC) name for the following compounds? Br T H/XL ‘AO/KIK“) BrMOH 6‘0“? EV“ Mots—WWW» / s-Bmwol l’Bf‘GMG "5"th Cxldo 1" Prep”; 7. Draw the Kekule' or Lewis structure of acetonitrile, CH3CN. H l 8. Draw the atomic orbitals that overlap to form the bonds in acetonitrile. ob”) (a seal luv—VF / - . 9. Ammonia is available as a 0.5 M solution in diojane [structure below...aithough you should know it, right?). Hydrochloric acid is also available as a solution (4.0 M_]_in dioxane. When mixing these two solutions, a precipitate forms. What is that precipitate? .._U _. ____ __ W3 ~ 0 f ' wig £91], I diox‘ane . Why is it not soluble when the components are? Why does it form anyway? \ f-1 I ll " r‘ 5 0-? *0» kid: I!" (5 hog-1651;“? '1 i)— ! bile abli‘ *pétm bond-S , “H” ‘3‘“ at” ENE/r WWW 900'. of dthaM A ‘31,. {Jams germ," 444, H is‘ HC/l mint "I?" F: 59"? 47 i") in“. ' ' I ““ Finally, a solution of ammonia in dioxane isn't much fun to work with. if you let it sit for along 7) time at room temperature uncovered you will find that much of the ammonia is gone and , i ' ” i l 5r llm l l) 14 flmmnm evaporate; Baum. 01C l‘l’5 relal‘rl'l In“ bellb Po“ ‘ B b m ow} no): out polar . 60 item Is mg 11;. (Malt 5‘9""! OP 0’“ W35 ‘5' "‘ SMM‘ l insmad a lat (if—Wt Why does the ammonia leave? Why does the Q'l' FO'M JUMP I“) “if, bmfi. Ir (c b0 water come in? A) Ln-lfijrt girth": bgoo,‘ 41L eletlmnfiah'rfl", 09 Gk‘lflm [‘5 3.553% dl’tml". his.“ $kwlu 110A - farm d swab-aha} htffi’fih 5W9 WK WW9 W4.» Mimi l," 11';er 10. Draw both chair conformations of the following cyclohexane. Which is the lower energy r em conformation? In Bonus: The compound below is quite happy in the conformation I‘ve drawn. Why? v; CI ...
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CHM Fall 2009 Exam 1 - .§6A N &amp;quot; Chem 201 Name:...

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