fall 11 mid 2 - CHEM 14A YOUR NAME Instructor Dr Laurence...

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Unformatted text preview: CHEM 14A YOUR NAME Instructor: Dr. Laurence Lavelle FALL 2001 2ND MIDTERM (Total number of pages = 8) (Total points = 50) (Total time = 50 mins) "Carefully remove last page which is your Periodic Table.“ YOUR TA'S NAME .................................... .. WRITE lN PEN (Show all your work on this paper.) Constants and Formulas Planck constant, h = 6.63 x 10'34 J - s Avogadro constant, NA = 6.02 x 1023 mol'1 Rydberg constant, R = 3.29 x 1015 H2 Gas constant, R = 8.314 J.K'1.mol'1 Mass of electron, me = 9.1 x 10‘31 kg Speed of light, 0 = 3.0 x 108 m.s‘1 O°C=273.15K 1L=1dm3 1atm=101.325 kPa 1t=3.14 h2n2 E=hv ‘ E=pc En=§-m—l:z p=mv hi? En=‘ “fiZ‘ v C=}\.v PH = pKA+ Loglfiw [AH]INITIAL ACID 2 - Solution to AX2 + BX + C = 0 is X = B +/ 4A0 Q1. A) Draw the Lewis structure and determine the formal charge on each atom. (1 0P1) + 1/ 5", 0 7+ NO 0 6:“ ' 2-1;: 07¢] 35:- w-ew) :5"("€1;+’¢) ’ (M) N2 gl/ Asia/1;: 1 /06- FC;:"’ 2*2' ~ / CO c {45‘ Tia—.21 OWL] O i: “:ffi’“) (M) _ .. g 1, 16/ *) W) C” C 6/6" “(Cg/:z7— 4/ 5’6” F6: €4~[fi§-+Z) +{€~ 3“] WW» (m) :0 02. A) N(CzH5)3 CH4 identify the following species as Lewis acids or Lewis bases. (4m) ug;n‘ zflflffk\‘”§\cgq C”! f/(z 3 “if? i (E yé - / . 5-6 F\SIZ\ F 5x F 76 “a _ M :f: a M 7— c: (he- /V 5'6” +fe’ *“”‘ /9e‘ For each pair, determine which compound has bonds with greater ionic character. mm) m Circle your answer. or [27d or 082 Z¢L7J9 QB. Write the Lewis structure and the VSEPR formula, name the shape, and predict the . approximate bond angles. (10pt) CF30| C 4 6‘ 46' d 75" 7 e 326" Gala 44’ ye“ 376 I; ?c~ 2(‘C~ ‘ A x? (M) /T“ "I WM {M} I“. l 20' (m) 31/ / /4fl§ 2': Q4. Draw the molecular orbital energy level diagram for N2 and use it to answer the questions on the next page.' (10pt) Clearly label all orbitals. ,A./.. 4-0. 2519 12.. M .— /‘1. 0. 14.0. figfx Wavy 1,91 4 4 fl“ What is the bond order for N2 K 0. v: W KO 2 N22 5.0 ‘ #34) (W :(8—4) QM) 05) 0 3+ d label (full name) the cis and trans isomers for [Co(NH3)4(H2 )2] A) Draw an '7 3 ‘1" o #1 0 #7, Ag 4’ ) o #2, Hz” / W4, \ Co / Co fly” I / i \ M W [if H?” 0H2 3) Draw one optically active isomer for [Cr(ox)2(H20)2] (4pt) ...
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This note was uploaded on 02/08/2012 for the course CHEM 14A 142042200 taught by Professor Lavelle during the Spring '10 term at UCLA.

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fall 11 mid 2 - CHEM 14A YOUR NAME Instructor Dr Laurence...

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