Chemistry 111 Homework #3 Due: September 21, 2005 (Wednesday) 1. Determine the frequency of an ultraviolet photon of light that has a wavelength of 35.4 Å. a) 3.00 ×108s-1. b) 1.18 ×10–17s-1. c) 3.33 ×10–9s-1. d) 8.47 ×1016s-1. e) 2.82 ×108s-1. f) None of these. 2. Consider the following diagram: Calculate the energy for sixphotons of that particular electromagnetic wave. a) 1.21 ×10-29J b) 3.27 ×10-21J c) 1.18 ×10-20J d) 1.18 ×10-25J e) 5.45 ×10-22J f) None of these. 3. How many of the following statements concerning infrared radiation are TRUE? 1. It is less energetic than ultraviolet radiation. 2. It is less energetic than visible radiation. 3. It has a lower frequency than radio waves. 4. It has a longer wavelength than X-Rays. 4. What is the wavelength of a given photon of light if you are told that a small stream of identical photons that contains a total of 25 photons has a total energy of 1.69 ×10-18J ?
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