SP 08 Exam 2 - CHM 2045 Exam 2 (Form Code A) March 04, 2008...

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CHM 2045 Exam 2 (Form Code A) March 04, 2008 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. Keep your exam sheet (mark your answers on it and the scantron sheet). Turn in only the scantron. Any bubbling error will count as an incorrect response . Your name on the answer sheet states the assertion: I hereby pledge that I have neither given nor received unauthorized aid during this exam 1. What is the vacuum wavelength of light that has a frequency of 1.4990 x 10 10 s -1 ? a) 2.0 m b) 2.0 dm c) 2.0 cm d) 2.0 nm e) 2.0 pm 2. The lowest frequency light that will produce the photoelectric effect is called the “threshold frequency”. The threshold frequency for platinum is 1.3x10 15 s -1 . What is the closest value to the energy of a photon of this radiation? a) 8.6x10 -19 J b) 1.96x10 48 J c) 5.1x10 -49 J d) 518 kJ e) 2.3x10 -7 J 3. What is the closest value to the vacuum wavelength of the light (in nm) emitted when the electron in a hydrogen atom drops from energy level n=6 to energy level n=4? a)
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SP 08 Exam 2 - CHM 2045 Exam 2 (Form Code A) March 04, 2008...

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