Discussion 4 - key - Key for Discussion Worksheet 4 1....

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Key for Discussion Worksheet 4 1. Ultraviolet radiation and radiation of shorter wavelengths can damage biological molecules because they carry enough energy to break bonds within the molecules. A carbon-carbon bond requires 348 kJ/mol to break. What is the longest wavelength of radiation with enough energy to break a carbon-carbon bond? ( 29 ( 29 nm m x J x x s J x hc E c h E J x x mole kJ J mol kJ s m 344 10 44 . 3 10 779 . 5 10 9979 . 2 626 . 6 10 779 . 5 10 022 . 6 1000 348 7 19 8 34 19 23 = = = = = = = - - - - λ υλ υ 2. The binding energy of electrons in a metal is 193 kJ/mol. Find the frequency of the metal. Hz x s J x J x h E h E J x x mole kJ J mol kJ 14 34 19 19 23 10 84 . 4 10 626 . 6 10 205 . 3 10 205 . 3 10 022 . 6 1000 193 = = = = = - - - 3. The distance from the Earth to the sun is 1.5 x 10 8 km. Find the number of crests in a
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This note was uploaded on 05/15/2011 for the course CHM 116 taught by Professor Matchett during the Fall '11 term at Grand Valley State University.

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Discussion 4 - key - Key for Discussion Worksheet 4 1....

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