241A EX1 KOERNER_MWFa

241A EX1 KOERNER_MWFa - Exam 1 Chemistry 241A Wed September...

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Unformatted text preview: Exam 1 Chemistry 241A Wed., September 15th Fall 2010 (Dr. Koerner) at 1pm Full Name: (printed) Student lD#: Page 1 (questions 16) (out of 24 points) Part One Page 2 (questions 7-11) (out of 24 points) Page 3 (questions 12-15) (out of 24 points) Part Two Page 4 (questions 16—17) (out of 20 points) Page 5 (question 18) (out of 12 points) You should have 18 Questions Total Points on 8 double-sided pages (out of 104 possible!) Instructions: 9 Do NOT start the exam, yet. We will ALL start the exam at the same time. a Print your Full Name and Student ID # on the exam cover sheet (above). a This exam is 50 minutes. Exams handed in late will not be accepted. 0 Turn OFF your cell phone (& ALL other electronic devices) and store them. 0 NO notes or text or any prepared documents or recordings allowed during the exam. - Initial the lower right corner of each page on this exam. (Pages can inadvertently get lost during transport & grading) o Remove your CAT card (photo ID) & place in an easily accessible place (in your front pocket, ready for presentation). Question fl (4 points) Draw the bonding structure with all non-bonding valence electrons (lone pairs) for the compound called urea, NHZCONHZ. Circle afl lone pairs. QfltiQfl £2 (4 points) line structure m _a_ fine structure for a compound that contains: hydrogen atoms and only one sp3 hybridized carbon and only two sp2 hybridized carbon atoms. line structure uesfion OH Provide the molecular formula of the compound shown (at right) I: (molecular formula) 41: w ’3 “o 9. 3 L”, Question #_4_ (4 points) Draw formal charges ([email protected] and/or 6) on the nitrogen and oxygen atoms. Question fig (4 points) Draw the resonance structure which results from the "electron pair movements." Boldly circle a_l_l lone pairs and formal charges in your answer. {Re c ° N_:C—0 : <—> 7 Question fig (4 points) Given the nitrate anion (NOa'), There area lone pairs (non-bonding pairs of electrons) in the entire anion. (enter a number here) Page 1 7 our initials Question #_7 (4 points) Write the lUPAC name for this compound 1 Question £12 (4 points) CH 3 CH3 CH3 H3C CH3 Circle ALL of the constitutional isomers Question £2 (4 points) Question fig (6 points) Draw the bonding structure for a compound with the molecular formula, 03H4, and only two sp hybridized carbons. Draw ALL bonds to ALL atoms as wedges, dashes, or lines to show the shape around EVERY carbon. Draw all p-orbital(s) and hybrid orbitals around the cen ral carbon. Question m (6 points) Given the structure below with all of its lone pairs of electrons already shown, A) Use mechanism arrow(s) to dissociate the most polar bond and draw the structures of the products. B) Draw fl circle afl formal charges [email protected] and G) where necessary on any atom(s) i_n the entire scheme. C) Draw arfi circle a_ll lone pairs of electrons in your product. Page 2 your initials Question E12 (6 points) Given the structure with NO n_e_t charge (overall neutral molecule). Draw file Resonance Structure. A) Draw and circle all lone pairs of electrons Lame entire scheme. A B) LJ§§ mechanism arrowls) to show _ the electron movement(s) needed HN—N_NH2 "—> to form the resonance structure. C) Draw fl circle afl formal charges. UseC—D [email protected] where necessary on any atom(s) in the entire scheme. Question #13 (6 points) Provide a label in the Answer Box for each Hybrid Orbital Energy Diagram. Your choice for each Answer Box is either: "carbon" or "nitrogen" or "oxygen" or "incorrect." 28:)3 2893 28P3Efiiflmm 1s|jfl 1s|jfl HUB QUEStiOh #14 (6 points) Circle A}; compounds th_at have the exact same physical properties (same melting point, boiling point, etc.) CH CH CH H30 3 CHZCHB 1,1-dibromo-2,2,3-trimethylbutane ( B332 Br Br ' H3C CH3 CH3 W><’/Br Br Br CH3CH20<CH3)20H2CHBT2 Question fig (6 points) A) Draw flue structures pf A; possible stereoisomers of the condensed structure: B) The total number of p-orbitals in any one structure is: Page 3 _ _ _ if our lnltlaIS (CH3)3CCHZCOCH=C(CH3)COH Question fi (10 points) The line structure for Adinazolam, used as a sedative and antidepressant, is shown below. A) The total number o_f B) m total number _f hldrogen atoms that are m at_°m_3. Mm é p-orbital is: bonded Q sp3-hybrm Cl _ carbon aim is {:I D) m of maturation N ) The total mm; 9: //< \l B one pairs 31 spzflybridized : orbitals is: ____ Name th_e functional group i_r1 th_e dotted M "O W fl (10 POintS) (functional group name) ‘ Circle the structure(s) in the Answer Box that is(are) resonance form(s) of Compound A. Compound A Draw another resonance form of Compound A that is NOT pictured above AND has NO formal charge on oxygen. Draw and circle a_u formal charges Use® [email protected] where necessary on any atom(s) ip your resonance structure. Draw and circle a_H lone pairs of electrons in your resonance structure. (another resonance structure) Page 4 our initials Question #18 (10 points) A) Given the line structure below, provide its full IUPAC name. IUPAC Name B) Provide the common name for the Complex Substituent that is a chain. Br (common name) C) Provide the systematic name for the Complex Substituent that is a ri_ng. (systematic name) D) This compound isa primary secondary tertiary quaternary ' alkylhalide. (circle one) E) Provide the IUPAC name for this complex substituent 4 3 Periodic Table of Elements ww-“—— Representative clcmcnls Alkali Alkaline Mogam Noble man}; earlh gases ; metals $ t 1 18 Period Group Group number lA 8A WI ' 2 13 14 15 16 17 .__z I H Group Group Group Group Gmin Group H 8 2A ’lA 4A 5A 6A 7A “m ‘ r ' r ‘6” 7 T" 9” "TB" 2 [—~—-——v—~— 'l‘runsiiiun elements “’1 O F WM) fill It.” ' "17” ’1? 3 3 4 5 6 7 8 9 10 11 12 0 Ar j 33 48 SB 613 7B 35'“ m5 : :2‘23 1 :w * v 35 T33“ Br Kr \ (Sm Metals *lfinlhnnides , _ I Mclzllloids mgr ‘qur m r Tibia fig) Md No Lr page5 153,; WI: 5591'“ mun-tides , Pg, ‘ ., ‘ 1m «2w "‘ ‘_ __ Nonmcmls your initials ...
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241A EX1 KOERNER_MWFa - Exam 1 Chemistry 241A Wed September...

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