PAST EXAMS - EXAM 2 - SPRING 07

PAST EXAMS - EXAM 2 - SPRING 07 - CHM 2045 Exam 2 (Form...

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CHM 2045 Exam 2 (Form Code A) March 06, 2007 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. Rhc = 2.18 x 10 -18 J/atom; Planck constant, h = 6.626 x 10 -34 Js c = 2.99 x 10 8 m/s : Rydberg constant, R = 1.097 x 10 7 m -1 1. Which of these processes is endothermic ? A. O 2 (g) + 2H 2 (g) 2H 2 O(g) B. H 2 O(g) H 2 O(l) C. 3O 2 (g) + 2CH 3 OH(g) 2CO 2 (g) + 2H 2 O(g) D. H 2 O(s) H 2 O(l) (1) A only (2) B only (3) C only (4) D only (5) A and D only 2. Calculate the wavelength of a photon corresponding to the collapse of an electron from n = 6 to n = 4. (1) 2424 nm (2) 3434 nm (3) 3509 nm (4) 2676 nm (5) 2626 nm 3. Which of the following transitions in a hydrogen atom would emit the lowest energy photon? 1) n = 1 to n = 2 2) n = 3 to n = 2 3) n = 5 to n = 1 4) n = 2 to n = 8 5) n = 6 to n = 5 4. All of the atoms in the following species are in one plane except 1) C 2 H 4 2) NO 3 -1 3) COCl 2 4) N 2 F 4 5) N 2 F 2 5. Which one of the following species would not be expected to have a tetrahedral shape? 1) GeH
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PAST EXAMS - EXAM 2 - SPRING 07 - CHM 2045 Exam 2 (Form...

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