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chm2045Exam2

# chm2045Exam2 - CHM 2045 Exam 2(Instructors Gower Mitchell...

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CHM 2045 Exam 2 ( Instructors: Gower, Mitchell, Harrison. Ucak) (Form Code A) October 20, 2009 Instructions: On your scantron sheet enter your name, UF ID number (start on the first space and leave the last space blank), Discussion Section No. and Form Code (see above). This exam consists of 25 multiple choice questions each worth 10.0 points for a total maximum of 250 pts. You may retain your exam sheet (mark your answers on it and the scantron sheet). Turn in only the scantron. Bubbling errors of any kind will count as an incorrect response or result in the loss of points. Rydberg constant R = 1.097 x 10 7 m -1 ; Rhc = 2.18 x 10 -18 J/atom; Planck ’s constant h = 6.626 x 10 -34 Js; c = 2.99 x 10 8 m/s; 1. Calculate the wavelength (in nm) of a photon emitted by hydrogen atom when an electron drops from n=5 to n=2 state. 1) 4.34 x 10 -7 nm 2) 434 nm 3) 1280 nm 4) 1280 x 10 -7 nm 5) 135 x 10 -6 nm 2. Identify the atom or ion corresponding to an atom with ground state electronic configuration [Kr]4d 10 5s 2 5p 5 1) In 2) In + 3) Tl 4) I 5) I + 3. The wavelength of radiation used in a microwave oven is 2.10 cm. What is the energy of one photon of this microwave radiation? 1) 1.66 x 10 - 23 J 2) 9.47 x 10 - 24 J 3) 1.07 x 10 - 24 J 4) 1.03x 10 - 23 J 5) 1.66 x 10 24 J 4. Which of the following sets of quantum numbers (n, l , m l ) are not allowed?

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chm2045Exam2 - CHM 2045 Exam 2(Instructors Gower Mitchell...

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