14b2m2k1

14b2m2k1 - CHEM 14A , YOUR NAME Instructor: Dr. Laurence...

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Unformatted text preview: CHEM 14A , YOUR NAME Instructor: Dr. Laurence Lavelle WINTER 2004 2nd MIDTERM (Total number of pages = 7) (Total points = 50) (Total time = 50 mins) “Carefully remove last page which is your Periodic Table.“ YOUR TA’s NAME James Wilking Joshua Antelman John-Carl Olsen WRITE IN 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, = 3.29 x 1015 Hz 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 0°C=273.15 K 1L=1dm3 1atm =101.325 kPa 71:3.14 h2n2 Ezhv E=pC Enzm p=mv h»? h En: - F2— A=E C=kv H— K+LOGEW E-lmv2 A XAx>h p -p A [AH]INlTlALACID — 2 p ‘47: 2 Solution to Ax2 + BX + c = o is x = —---——B +/ :BA 4A0 QlA. Predict the electron arrangement in NI-Ig'. ‘ B. What is the shape of BrO4’? a“ tetrahedral C. What is the shape of AsF3? trigonal pyramidal .. A" :E/ /5\ :E’: a ’n ‘t # ¢x0 :Ow‘ 716’ 2")! (6": 2246’ 515' 3 x ? = We” 26-6,” (3pt) (3pt) (4pt) QZA. All of the following have a linear shape except (3pt) (Circle your answer.) :7, I :i ’- 55 r I B. Which of the following has bond angles slightly less than 109°? (4P0 _ " (Circle your answer.) . - S 1 7 Z/ I ' C532” ASF3 SO2 coc12 / 5‘ J I _ ’ _ Z - "S " ' i g“ 1 5‘ Me {44 I. _ . - _ . . I a. ' 3 F; n ' _ \ . C. Which of the following is polar? (3130 (Circle your answer.) 21 e, -' — o XeF N20 /o/ 6 A - Me 3 2 1/ r A/ _, a P=5lé= ‘f‘VXeP {'1 4-5, Q3A. How many 0- and TL—bonds are present in diazomethane, CH2NN? (Zpt) 4 sigma and 2 pi //_e:- #\ c A/ ~ /1/" / __ _' H B. Which of the following has the longest bond? (Spt) (Circle your answer.) t —— T— "' 7K 1 ( 1’ * ¢ 7'? g 0: 45 6) l 5“ (LS'LQZ/w 77% 773M 771/3? (SE/’5‘ C. All of the following are paramagnetic except (5pt) (Circle your answer.) 00+ A 02' @ N22“ 02 N22+ Q4. Identify the hybrid orbitals used by the phosphoruse atoms in the following species: A. PCl4+ 3 Z a’ 7 7“ (2pt) _ / I I “y F A/é: / 1 I . ' 4 7" B. PC16' 2" 5’9” @ I ' (2pt) {X4/WX7-e7= 91/6 \K/QU /e’ r / \ 4&7»; CC / at C. P05 1% 2L6, l .. (Zpt) qud fl / D. PC13 20/5" ' ’ (2pt) QSA. In the complex ion [Ni(OH2)6]2+, v (2133) (Circle your answer.) 0H2 is a Lewis acid. 0H2 has a charge of —1 in the complex. Ni has an oxidation number of 0. Ni is a Lewis base and 0H2 is a Lewis acid. Ni is a Lewis acid and 0H2 is a Lewis base. Ni is a Lewis acid and 01-12 is a Lewis base. B. What is the oxidation number of iron in K4[Fe(CN)6]? (2pt) +2 C. What is the name of the complex Na[Co(NH3)3Cl3]? (4pt) sodium tri amminetrichlorocobaltatefll) lpt lpt lpt lpt D. What is the coordination number of the complex N a[Co(NH3)3C13]? (2130 6 ...
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14b2m2k1 - CHEM 14A , YOUR NAME Instructor: Dr. Laurence...

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