Summer 2003 Test 1 - Chemistry 227 ssi 2003 Test 1 Dr Wells...

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Unformatted text preview: Chemistry 227 ssi 2003 Test 1, Dr. Wells, Name :L rawscore=opscanxj+essay=flx5+ =fl3’ Obs} / {'10- i 1. interest in vitaliSm began to decrease when . W - A. Rutherford demonstrated that nuclei are dense cores of positive charge "f ; {LI-f B. it was shown that lightening was not necessary for the creation of life C. Schrodinger developed the mathematical techniques to create MOS by hybridizing A05 Q U. Avogadro finally counted die bill I ll)” atoms in llflfl grams of carbon ® an organic compound was made from an inorganic reactant We; kit-If“ 3. Cannizaro helped establish A. that organic compounds are composed of primarily C. H and D B. the concept of restricted rotation C. s and p hybridization D. the concept of cis and trans isomers CE) methods for determining the molecular female of an organic compound 3. Keltule would most iiiteiy have said which of the following at a dinner party 1’ to a. "I like brownies. but I‘m allergic to the oils: pecans." E. "Combustion experiments are for the birds; show me some real chemistryll" C. “The sp" MU‘s have roughly the same energy as the remaining p orbital. so more is no pairing." D (9 "All last night I dreamt of snakes — some of Which were biting their own tails." E. "Then I told him ‘Duh. everybody knows ebloroflurocarbons deplete the ozone layer' 4. Pi {rt} bonds are formed A. by onhybridized s atomic orbitals B. only in cyclic compounds (d @by parallel p orbitals on adjacent carbons atoms that contain an electron each D. only between hydrogen and very electronegative elements like N. Cl. and F E. by end on end overlap of orbitals 5. Bond angles abuut sp" hybridimj carbnns are roughly . RED“ ,a ( 13.90“ 4-5 fl 10 c, C3912; / cm // E 13C!" V 6. CH; is an example 0f 2%. a strong, acid ',__':'\ ® a carhaninn p c D 7'. Unsaturated hydmcarhons C. an alkyl hmmidfi D. a radical E a phenyl gmup I A. mntain at least one; double urniplc band I/ B. cuntain a pi bDfld V” C. cnntain sigma bonds v"- D. A and B only (13) all (If these 8. Radicals , Wk — I“ A. are. nfigativdy charged a Safe” B. are positivelycharged C. cnntain a halogen liq- . ( WU; g D. have two lime ufcleclmns K k N} LC“) ® cuntain an add number uf electmns ""' QE- 5 117L311 9. The Lewis structure of HE is :0 I Ill .- a H. II nag: =F_1~2 Hwy/E: =32:- : ._ : :F/ \F - E :IF': .1: .E : : u " ' I I A B C D .r qfiflfl '1' 10. The VSEPR structure of CH: is E? I I CNN-11H ] i .n'I'I'iH @‘H CH“ A 6) i5 11. The VSEPR model of CBrlCiz is shnwn The net dipole would he 12. Cnmpnunds x and 3' are _ . {5 A. eensfitufiena] isemers E identical eempnunds ' . enntain a phenyl gmup D. had In the hem: E. interesting. but net bad In the bnne 13. Place the melee-ales at the right in order of increasing acidity. T weakest acid . . . . . strongest acid H_$HH A. 1 3 2 4 H a. 43 2 I I C. 2 l 43 C13) 123 4 3 l e 2 D E. :2 y H Br 0 H—Ji—CI—H H—h—E—o—H “— i L 2 3 14. Which of the following reactions is least liker to take place ‘3' A- + —I/’h.- + + ® “(6‘3 4.7.1 50 .a (a) NaCH3CHZO + (trauma 9%. r~arzrrg2a3 + engages "' go I ‘l C. antics-or:2 + H2123! LI» CH2=CH2 + NaoH I"! H”! NaH+NH—s-H+HaNH{:l D. 3 2 2 £3 35 t 155‘ or“ E. NaCaCH -t- H20 —"" HCnC'H + NaUH Ho :15 15. Constitutional isomers always have the same .x . or “f ""- . L molecular formula I]. empineal formula III. melting point IV. eonnoznrit}r A. lonly (E) l and II only C. I, [L and I ll only (—3) D. land III only E. 1. 11, ill, and IV 16. Aleohols have a higher boiling point that alkanes of a similar ntolemilar mass because A. the alkanes must contain more hydrogens than the alcohol to here a similar molecular mass B. carbon atoms have two unpaired electrons in its eIeen'onie ground state C% oxygen has a greater atomic mass than carbon 9 hydrogen bonding occurs in alcohols E. alkanes are typically smaller 17. Torsional strain is a result of A. deviation from 1311]“ bond angles about sp earhnns B. deviation from llfl“ bond angles about so3 carbons E. deviation from 1 lil" bond angles about so3 carbons 9 (IE sterie crowding i_n eclipsed confonners E. sterie crowdng in staggered conformers Essay 1 {5 points}. Complete the mechanism fer the reaction beidw by supplying cunred mews. Use pKe values tn discuss the enen: the: the femaid reaction will occur. ’19 .L 16: f ‘5‘ e 7’... H H—{lt—E: + Ha: I. H_I_-0-_H + =--=e H K] H “ m We as an? w? w emu—3A Pri'blfl‘M? [06:99. Hmkw {Rb-1‘1 UH ge’MJ-(bf’fial “1’3. Essay 2 (5 points). Carbexylic acids are more acidic man cuter compcunds that captain D~H bends. My? Give rwc reasons. Draw resonance structures. Acetic acid is pictured below as an example. 9 (Lyme-Genre. {abbiH-iu-Hen er? 4eme Cwap7hk) ' . a 9 1"“éwfifl Big-Mei“; Pair up eIee‘lf/cm beiwm o e H m. fence Mo meme 10.? “mw o. H c 5' I H F: Essay 3 (5 points}. Name the following Damp-Gums: O” F I ’— Lgolopmm Javulok‘finhf. \tk/ 3-chlw— 5-¥imm~'-1—1'5opmrw! Mafia: 0'" ‘H'Cl-Hbi'b‘bfluj'kfl) - W Cl Br Br W 6‘7er bu‘l‘j I anhnfi, '23—" (a aha-“M my 1N1 ~é;br¢h«o-g_bmwfl ,_, 5' Cl- ha‘i’hfipnfal); 1.1.1.an \ ..--x'.____,r"\\ WEN]! Lfom ML 44% NUNWClk>mr ) sf sfl’x. '- ...
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This note was uploaded on 06/19/2008 for the course CHEM 227 taught by Professor Wells during the Summer '07 term at Campbell University .

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Summer 2003 Test 1 - Chemistry 227 ssi 2003 Test 1 Dr Wells...

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