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241A-Exam1_Fall2010-MWF_AnswerKey-opt

241A-Exam1_Fall2010-MWF_AnswerKey-opt - 1 Chemistry 241A ed...

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Unformatted text preview: 1 Chemistry 241A ed, eptember 15“h Fall 2910 (Dr. Koerner) at 1 p Full Name: (printed) Student lD#: Page 1 (questions 1-6) C?!” Q c? 7D? tof 24 p0 Part One (p L A”; c, rt Page 2 (questions 7-11) 0 P ~§6flmf£a (out of 24 points) ‘c In. ints) Page 3 (questions 12.15) (out of 24 points) Page 4 (questions 16-17} (out of 20 points) Page 5 (mm 13) (out of 12 points) You should have 18 Questions on 3 double-sided pages lngtrggtigng: . Do NOT start the exam, yet. We will ALL start the exam atthe same time. 0 Print your Full Name and Student lD # on the exam cover sheet (above). . This exam is 50 minutes. Exams handed in late will not be accemed. 0 Turn OFF your cell phone (& ALL other electronic devices) and store them. a NO notes or text or any prepared documents or recordings allowed dufing the exam. 0 Initial the lower right corner of each age on this exam. (Pages can inadvertently get lost during iransportilt grading) . Remove _v_our CAT card (photo ID) & place in an easily accessible place (in your front pocket, ready for presentation}. Question #1 (4 points) D_raw t_he bonding gigging with all non-bonding valence electrons (lone pai F.-— "mu-p cund called urea NHZCONH ' - " - 9mm fl (4 points) Dray! a line W for a compound that contains: hydrogen atoms and only one sp3 hybridized carbon and only two sp2 hybridized carbon atoms. am it (4 mime) Provide the molecular formula a 4; of the compound shown (at right) Go "a 0 _molecular formula) Draw formal charges (@ndlcr. on the nitrogen and oxy atoms. Question fl (4 points) it _ . , (arc/@6959 Gwen the nitrate anion (N03), (:3) . (8 Q There are. lone pairs (non-bonding pairs of electrons) in the entire anion. (enter a number here) W»- in la s Question fl (4 points) Draw th_e bonding structure with all non-bonding valence electrons (lone pairs) for the compound called urea, NHchNHz. Qirgle gfl lone pairs Question Q (4 points) Div! a Erie structure for a compound that contains: hydrogen atoms and only two so3 hybridized carbon and only two so hybridized carbon atoms. Question 1% (4 points) . OH Pfrofinde the molecular formula Elli:— o ecom ounds own atri ht :3 ( 9 ) (I; #2.: 0 (molecular formula) Draw formal charges (useG) andior e) on the nitrogen atom in the structure. Question Q (4 points) m the mam Myra which resutts from the "electron pair movements." Boldly circle a]; lone pairs gig formal charges in your enema {3.9 :N=C O: 1—!- U .. Question fl (4 points) A bond between two atoms differing in electronegativity by 0.4 is called 'a(n): 1‘1. -. . Write the IUPAC name for this compound 99.93593 18 (4 pointS) £23; Circle ALL of the constitutional isomers q 6) my: (4 points) - Questism i2 (4 points) The tert—butyl group can be called . _ - ‘ - w») nggtion m (6 paints) Sample Problem from Drscussnon Sessmn 9/222? ’6’ 5M1 D bonding Mule for a compound with the molecular formula, 03H4, an A2”) ;, arie‘w‘ on p hybridized carbons. ' ,é’ ' a” ' HM. , dashes argues to s owtheisfiape around EVERY carbon. A) Use mechanism arrow(s) to dissociate the most polar bond and draw the structures of the products. B) M8 and sizzle all found m Use® [email protected] where necessary on any at°m(3) m Ihfi m M- C) m m1 side am m am. of electrons in your product. @33th fl (4 pointS) . Write the IUPAC name for WW 2 *- e #7/ r C, 1"czé},m fig/ecfclofomfwu constitutional isome Qgesflon fl (4 points) fl—Kr fablL/S. The tert-butyl group can be called '4 / _ (ya-m. #y/ e #5 7/ Quegtion m (6 points) A) Use mechanism arrow(s) to dissociate the most polar bond and draw the structures of the products. UseG-D ande where necessary on any atom(s)1_r1 me entire 3 - C)_aflDr mmleailknei. of electrons in your produ m m (6 points) the electron movemenfls) needed to form the resonance structure. gm m (6 points) Provide a label in the Answer Box for each Hybrid Orbital Energy Diagram. Your choice”. for each Answer Box is either: '@ 0r 'dfimTenb arm" or "@3' Question m (6 points) B) The total number of p-orbitals in any one structure is: (7. (CH3)20HCOCH=C(CH3)COH . W‘“ ”rial" b. A) main: line mm 91' AM. We of the condensed structure: QM m (6 points) Provide a label in the Answer Box for each Hybrid Orbital Ener Diagram. Your choice for each An- -: Box is eitheW- "incorre ‘7“ 42- f . @41 m a» m M; +0-122th 4( PointS) emu—M ou summmufi' ugh si Imeéiefi A (same melting point. boiling point, etc.) __ kibrcimo-Z.2.3 B) The total number of p—orbitals in any one structure is: r Page 3 7 cu i itials condensed structure: (CH3)3CCH200CH=C(CH3)COH 99931103 #16 (1 0 points) The line structure for Adinazoiam, used as a sedative and antidepressant, is shown below. A)The1m1numbe:9.t whammy! nutmeg mmmg @Jfi We. «9 Fr (funcfional group name) '- O nce form(s) of mm A gag . NT: MW? ,4“ / f5 trg‘hk | N O 6') 1/ 5’3 I _,. canonic- es Man-M“ 0 Draw mug: of Compound A that is NQT abov- rmal charge on oxygen. (“W Draw gag -. f "“ Jflf“ a_ll lone L: '3-- eiectronsi . 1, _.._ ,— (another resonance mature) Page 4 our i itials 9mm m (10 points) The line structure for Adinazolam, used as a sedative .- --d antidepressant, is shown below. A)Th919_ta_|n_umh.e.t2t ‘5 Biummm i6 ; mmma @i‘ ”mantis; _ @ N mnesmgflmsatumionki C)Th Malnumneroi \ e . .......... C} . lone airs i_n gpz mbrigizgd : 5 orbitalsis: l 5/N i "9 - 9‘6, -________\__§ Elflflmsmmngflmt ou.ci_nth__edott ttgd_b__ox (2/414? me ' I Ce . . a 9m_ #1 7 (10 WINS) (functional group name) .43 Circle the structure(s) in the Answer Box that is(are) resonance form (5) of Compound A. l& (4‘ JD“ Aer- wf (fly ”0er / lI/ 1/“ 9;“ ~ Zita/’7' \ ._ ct» \ may arm of Compound A that Is NTQ M" C pictured above AND ha%$ NW“ 4 . Z] ormal charge on oxygen wig {mt fl Myra D—mwflm 3;". 3T; UseC-D [email protected] where necessary on '5 ‘ 11m any atom(s) in you rresonance structure. 6”" if!“ d _9 Mr :5 mo (Mb) Quay mg __1 lone irs of electrons In y onanoe cture. another resonance structure) ' Page 4 , our i itials t! - : ' . # = _-ints) i A) Given the tine structure below provide its full tUPAC name. ljm LL11: -.Z) 5" gig/M; /" 22"" (it—mtg naively) i-S'” rovidethe u - - name for Complex Substituent that is a chain. gm (common name) C) Provide the systematic name for th - " f ”@1'" ° - Complex Substituent that is a flag. / ( .2. ?* dam c a, Law J'— J I E) Provide the IUPAC name for this complex substituent Wm/ w 13 14 15 t6 1? l GWGWIIPGWGIWGWH __ SA on TA:-- m - - Page 5 B) PrOVideth ""IIOI Izut‘ a ho..- - Complex Substituent that is a ._ .1 =,' all I f 5/11 - (common name) C) Provide the systematic name for Complex Substituent that is a Ling. E) Provide the IUPAC name for this complex substituent 4 J m ZZZ-k PefiodicTable of Elements v?) z '- JJM M7 If“ $7 I 8 9 ‘IO 11 12 -B I823 ...
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