Practice Exam 2

Practice Exam 2 - General Chemistry I CHE 131 Summer 2009...

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CHE 131 Summer 2009 Exam #2 Chapters 7, 8, 9 #1. Determine the photon energy (kJ/mol) emitted from a YAG laser with a wavelength of 532. nm. a) 0.225 kJ/mol b) 225 kJ/mol c) 1.31x10 3 kJ/mol d) 2.25x10 5 kJ/mol e) 1.31x10 6 kJ/mol #2. A hydrogen atom in its ground state aborbs light with a frequency of 2.922x10 15 Hz. To what excited state was the electron promoted to? a) n = 1 b) n =2 c) n =3 d) n =4 e) n= 5 #3. Which statement about the photoelectric effect is incorrect ? a) Increasing the intensity of light with an energy above E min that strikes a photosensitive surface will increase the number of electrons ejected. b) Increasing the energy of light above E min will increase the kinetic energy of the electrons emitted. c) Different photosensitive surfaces have different binding energies (E min ). d) The photoelectric effects demonstrated that photons have particle properties. e) All of the above statements are correct. #4. What is the correct electron configuration for Y, yttrium? a) [Kr] 4s 2 3d 1 b) [Kr] 3d 3 c) [Kr] 5s 2 3d 1 d) [Kr] 5s 2 4d 1 e) [Xe] 5s 2 4d 1 #5. Which of the following is not isoelectronic with Te 2+ ? a) Sb
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This note was uploaded on 10/03/2010 for the course CHE 131 taught by Professor Kerber during the Summer '08 term at SUNY Stony Brook.

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Practice Exam 2 - General Chemistry I CHE 131 Summer 2009...

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