Final Exam 2009 - Name: _ Student Number: _ CHM 2311 Final...

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Name: ________________________ Student Number: ___________________ CHM 2311 Final Exam April 29 2009 Professor Darrin Richeson There are 15 pages in this exam (including supporting materials and tables). Please count the pages to make sure none are missing. You may carefully remove the last three pages of the exam and use them for scratch work. Please write legibly and show your work to receive credit for your answers. Partial marks may in some cases be awarded for partially correct work. Question Mark Question Mark 1 /5 8 /4 2 / 9 9 /13 3 / 7 10 /16 4 / 16 11 /5 5 / 10 12 /12 6 /9 7 /4 Total /110 Good luck and have a great summer!
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2 1. ( 5 points ) A hydrogen orbital has the following complete wave function (both angular and radial portions of the wave function are included and the angular part is written in Cartesian coordinate form): { } ( ) = = 2 2 2 3 / 2 2 / 3 15 4 / 1 2 15 81 1 ) , ( ) ( ) , , ( r y x e a Z Y r R r o π ρ ϕ θ ψ where o a Zr = and Z = 1 for a hydrogen atom a o = 52.9 pm a. For this orbital, determine the distance from the nucleus in picometers at which all radial nodes occur. b. Determine the quantum numbers n and l for this orbital. Clearly show the process by which you determined these values. Identify the orbital (1s, 2s, 2p x , etc. ..).
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3 2. (9 points) a. Calculate Z eff for a 2p electron on each of the following species. O 2- , F - , Na + , Mg 2+ . b. Match the ion with the radii in the following table. Crystal (Ionic) Radius Ion 119pm 86pm 116pm 126pm c. Calculate the Z eff for a 4d electron of antimony (symbol Sb)
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3. (7 points) There are potentially three isomers for the anion NSO - . The two known species are NSO - and SNO - . The isomer SON - is unknown. Suggest reasonable resonance structures for each of these three isomers.
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This note was uploaded on 01/22/2011 for the course CHEM 2311 taught by Professor Mezl during the Winter '09 term at University of Ottawa.

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Final Exam 2009 - Name: _ Student Number: _ CHM 2311 Final...

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