Exa4[1]

Exa4[1] - Chemistry 103A Summer 2007 Exam 4 June 29, 2006...

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Chemistry 103A Summer 2007 June 29, 2006 Exam 4 Name______________________________________ID___________________ Signature________________________________________________________ Show your work on all computations so that partial credit can be given in the event of an arithmetic error. No credit will be given for bare numerical answers. ..you must show the numbers you combined to obtain the answers. Points will be deducted for not including units and for misuse of significant figures. 1. (6 pts) Rank the ions in each set in order of increasing size: a.) Cl , Br , F b.) Na + , Mg 2+ , F c.) Cr 2+ , Cr 3+ a.) F < Cl < Br b.) Mg 2+ < Na + < F c.) Cr 3+ < Cr 2+ 2. (6 pts) Draw Lewis structures of all the important resonance forms of: a.) N 3 b.) NO 2
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Chemistry 103A Summer 2007 June 29, 2006 Exam 4 3. (6 pts) Draw a Lewis structure and calculate the formal charge of each atom in: a.) COS (C is central) b.) NO 4. (6 pts) Phosgene is a colorless, highly toxic gas employed against troops in
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Exa4[1] - Chemistry 103A Summer 2007 Exam 4 June 29, 2006...

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