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Unformatted text preview: CH301 Practice Exam 1 Fall 2009 1. If the average bond energy for the C-H bond in methane is 435 kJ/mol. What frequency of light is needed to break the bond? a. 6.67 e35 Hz b. 1.09 e15 Hz c. 6.57 e38 Hz d. 1.09 e12 Hz 2. Which of the following statements is incorrect? a. The wavelength of light emitted by black body radiators decreases as the temperature of the body increases. b. The kinetic energy of electrons ejected by photons increases as the frequency of the incident radiation increases. c. The wavelength of matter is inversely proportional to mass. d. Photons of any wavelength will eject electrons from metal surfaces. 3. If an electron falls to the energy level n=1, and an emission spectrum was observed at 102.3 nm, what energy level did it fall from? n= a. 2 b. 3 c. 4 d. 5 4. If a particle is in a one-dimensional box of length 200 cm and is in its fourth energy level, at which of the following positions is the particle least likely to be found? a. 100 cm b. 75 cm b....
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- Fall '09