Exam 2 Form A Key fall 07CHEM103A Dr. Keller

Exam 2 Form A Key fall 07CHEM103A Dr. Keller - Chemistry...

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Chemistry 103A Exam 2A Answer Key 0. (2) The formula of chromium(III) nitrate is (a) Cr 3 N (b) CrN 3 (c) Cr 3 (NO 3 ) 3 (d) Cr(NO 3 ) 3 (e) Cr 3 NO 3 0. (2) Shortest wavelength radiation (a) FM radio (b) x-ray (c) microwave (d) infrared (e) AM radio 0. (2) When a substance has a very low specific heat (a) it must be a metallic element with a small atomic weight (b) the molecular weight is very small (c) a lot of heat is needed to increase its temperature (d) a small amount of heat can cause a large temperature change (e) a lot of heat must be lost to decrease its temperature 0. (2) A photon has an energy of 1.77 x 10 -25 J. Find the frequency. (a) 5.31 x 10 -13 Hz (b) 2.67 x 10 8 Hz (c) 3.75 x 10 13 Hz (d) 2.67 x 10 -8 Hz (e) 3.75 x 10 -13 Hz 0. (2) In an atom in an excited state an electron drops from an allowed energy of 2.00 x 10 -17 J to one of 5.00 x 10 -16 J. The wavelength of the emitted photon will be (a) 414 pm (b) 4.14 x 10 -8 m (c) 0.0414 nm (d) 4.14 x 10 -3 mm (e) none of these 0. (2) The formula of barium iodide is (a) BaI 2 (b) BaI (c) BaIO 3 (d) BaIO (e) Ba 2 I 0. (2) If the energy of a photon increases (a) the speed increases (b) the wavelength increases
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This test prep was uploaded on 04/14/2008 for the course CHEM 103a taught by Professor Weso during the Fall '08 term at University of Arizona- Tucson.

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Exam 2 Form A Key fall 07CHEM103A Dr. Keller - Chemistry...

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