Spectroscopy Practice Problems

Spectroscopy Practice Problems - Additional Practice...

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1 Additional Practice Problems: SPECTROSCOPY Chem 241-Section 1 Fall 2006 Professor Jorgenson c = 3.00 x 10 8 meters/second h = 6.63 x 10 -34 joule-seconds λν = c/n E = h ν A = ε bC A = -Log (T) = 2-Log (%T) 1) 0.461grams of a compound “Z” with a molecular weight of 154.12 g/mole was dissolved in 50.0 ml of water. A 10.00 ml aliquot was withdrawn, placed in a 100.0 ml volumetric flask and diluted to the mark with water buffered at pH 5.40. 4.00 ml of this solution was transferred to a cuvette with a 1.00 cm pathlength, and the transmittance was measured at 470 nm to be 53.1 %T. A second solution with an unknown concentration of “Z” has a transmittance of 29.3 %T. A) Calculate the molar absorptivity of “Z” at 470 nm. B) Calculate the concentration of “Z” in the unknown solution.
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2 2) Below is a diagram showing hypothetical energy levels and processes that can occur in a molecule. Each level or process is indicated by a letter. For each letter, give the name of the state or process
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Spectroscopy Practice Problems - Additional Practice...

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