W9.ans - -2 CHEMISTRY 114 Spring2010 Dr Audrey Dell...

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Unformatted text preview: -2- CHEMISTRY 114 - Spring2010 Dr. Audrey Dell Hammerich Worksheet - Week 9 l. Commercially available microwave ovens operate at a frequency of 2. 45 X 109 Hz. What'is the wavelength of this radiation? 9K: C, :7 '3 ‘ Qt c 9.341411%“? ms' 0 £19.. 1:. w ‘— M 3-. ‘ v 1.452 to“ a“ M . [12.2cm] 2. What is the energy of a 675 nm red photon? 69 V“):- heal“ (Q.(,’.L(¢D{Kw‘3l‘l 35 1.91141): (.01 m5“) —Q (”74" w m [2. 94x 10—19 J] 3. The work function (see problem 7.55 in text) of cesium is 3.43 X 10~19 I. What colors of light will eject electrons from cesium? __ 5M“ (mm = lav—— he“. ~— wou FOUQTWD + (Kim-rue been,“ no) :. 1’. .5...— ((,.g,9,(,o:znp-sw) «ma-nuns) " gflx’w-im W 5¢Onm “mm (a Wow 5-43 x W- m :5 [yellow and shorter wavelengths] 4. What wavelength of light is requiredto ionize a hydrogen atomI in its ground electronic state? BMW M'— W’” “amt crev- 33.21““; ' ‘lnz-l an Numeracy] Iowa-I =7 m; = 00 '1 (amount) 5‘rer :7 new . kc, - is: . Lt..(.3,(.o% x ao‘wk 1361141): to") .v T "' KY ”'7 1’3 '2 ' M ‘( 1.14m? x to“? [9.11><10“,8 m] 5. If the uncertainty in the position of a sodium atom Were 10‘4 In what is the uncertainty in its speed? A CM ml AX 2. MAW AX Z. 141411 *7 A la 9. (6.619033 to‘w‘x 6.013.101): to“) u.) “'“W‘Ax Hnm’)‘ _ Lur (12.14300'3663 (”WWW [1.38><10“5 ms‘l] 6. What is the de Broglie wavelength of an electron moving at 6.00 x 105 m s—1 ? mu, ’k *- k =7 _ 5‘t ’l h stews; w ’ mu, {$100.34} w‘b‘flthao x H75) [1.21x10—9m] . 7. What are the names, symbols, and allowed values of the four quantum numbers that charac— terize an electron in a hydrogenic atom? Pmoupeu Qumran» Uumww n: \ a. _ I 1 Aneommomévwm “' u L: 0,i,...’n" u mAenmxc “ ML" «fl, O 9. 5?”) u h 1 I I ) M5: ”‘11) Va, ...
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