6APractice_exam_2

6APractice_exam_2 - Chem 6A Practice exam 2 (for the new...

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Chem 6A Practice exam 2 (for the new book and outline) Below you will find a practice exam 2 for Chem 6A. The questions are similar to those you might expect to see on the real exam. The test below may be a little longer than the real thing, but there is no guarantee that it is longer or shorter; nor do I promise that all subject areas I will test you on are represented below . Take this practice exam as if it was a real exam, including time and contioions. Good Luck
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1. Consider the heteronuclear diatomic CN and its various ionic forms. a) (5 points) Draw the Lewis structure for CN –1 . Be sure to show all electrons! b) (5 points) Using your answer in (a) as a guide, describe the bonding in CN –1 using Valence Bond Theory. Be sure to include the hybridization in your discussion. c) (15 points) Using molecular orbital theory, draw an MO diagram for CN –1 , CN +1 and CN and rank them from most likely to exist to least likely to exist. Explain why. Be sure to use the MO diagram for Li 2 thru N 2 to answer this question. d) (5 points) Write the electron configuration for CN –1 (as derived from your MO diagram in part (c)). e) (5 points) Which of these three species (CN –1 , CN +1 and CN) would be predicted to be diamagnetic and which would be predicted to be paramagnetic? Why? 2.
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6APractice_exam_2 - Chem 6A Practice exam 2 (for the new...

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