J07chem1063exam2key - Chem 1065 Exam 2 J —Term 2005 Name...

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Unformatted text preview: Chem 1065 Exam 2. J —Term 2005 Name Show all work for credit Useful information: Formal Charge = Evan“ — (E"°""”"d‘"g +#”"”"‘ ) , iv = C , 0: 3.00 x 108 m/s, 1 1 1 h —=R[——--] ' J» - - 22 1:..— H 2 2 [IL/2a ~ 1 l mu)“ "f "" ,RH=0.01097nm'1 5A; a (y d2 (1 )(4 pts) A radio station broadcasts a radio signal with a frequency of 1500 kHz. What is the wavelength of this radiation? Is it an FM or AM station? {500‘ Lib. 1 I. 6'00 ,1: 1‘” #L L{1 500W": :1 1V : C n Mimi/Jayme Wu M 111? (2)(2 pts) How is green light different from orange light? green li‘glflt A”; 5. C/{fl‘m/Ti ‘flc ”C17 (3)(2 pts) How is a bright white light different from a dim white light? #1 MM" @924 f ,3 My 01114 We wig/m (4)(2 points) Which second row element should have the highest 3rd ionization energy? fie (5)(2 points) Place the following in the order of increasing electron affinity: B, Ga, N, Ba, Cs (504 (616 IV (6)(12 points) Draw the best Lewis dot structures for the following compo (a) 3032- f 4’ also, IQ 6-— (5+2) +/ ,0 1} M We 50 0Q MW 5 / oz falc- . . 0' a 9“ ['0]; 26f, I' ””44 lbhéQZv/J // (b) - , 7 _-,/ 89 E g? 26 N ' if m; f; ‘ "I /L(' \5' v 46) 3/6 (c) NF3 1/5“ ‘ 1”? ,4/ (W 5%) *3/30 3F] ’f’ r A]! [1” 1; TL" 1 ’ ,. 7//%//> 445:1” \ Inf I f// ((1)3132 5,“ 44/ , w m, ,, .f ,1 ( \ ,5130 .—’9 I ’15—,IQI / 3r g; .771 f.» {1/9, .1“ "5 ’ /// ,.,,_. (f) NO N)? ’ I I If; I! l 1/ ft 111/ :Ormo; 7 ? Mxo , (7)(2 points) Plac e following in order of increasing lattice energy. NaCl, LiZS, CsI, MgO, Ca3N2 GI), Md/ZQ 5‘), 1’90 1 63M (8)(4 points) A neutronL with a mass of 1.67 x 10 31 kg 13 moving at 25 m/s What is its deBro— glie wavelength? 1,467. ((11.5 1/2 Sig/U (lU‘XS points) (8 points) Create a Bomrr‘l—laber cycle to find the AH for the reaction below using the following information. Mg(s) + Br2{g) —————— > MgBrztfs) (SH: ‘1"? Brz bond dissociation energy :2: 193 kJ/mole Mg, AHsublimadon '—'—‘ lei-("J kj/ 111016 Mg (g): Eu 2-: 782 kJ/mole, Err; 34-51 ki/mole Bdg) Electron Affinity = -325 l-tl/rnole U for the reaction is 2440 kJ/tnole Extra Credit( 4» points): A, small radio requires 200 I of energy to play for 1 hour. If the radio w :13 solar powered, how many photons of 500 nm light would be requ1red to power the radlo for one hour? Extra Credit( 4 points): A small radio requires 200 J of energy to play for 1 hour. If the radio was solar powered, how many photons of 500 nm light would be required to power the radio for one hour? Wzé‘coxu/‘fk 5mm” , p \f _—/7 . {:61} (MOW/i501}firm/@375“ Jflm (9)( 4 points) An electron in a hydrogen atom falls from the n=6 to the n=1 level. What is the wavelength of light emitted in this process? I / / ,. . ,1 ¥ (,4 0.910792,L(l* 4L)" @/“/( / ...
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