CHEM+1311+Summer+Final+Exam

CHEM+1311+Summer+Final+Exam - CHEM 1311 Dr. Charlie Cox...

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CHEM 1311 Final Exam, 200 points 28 July 2009 Dr. Charlie Cox Name_______________________________ Summer 2009 Closed NOTE/Closed BOOK Guidelines: 1. Write your name at the top of every page. 2. Turn off cell phones and other electronic devices other than a calculator. 3. Do not begin until instructed to do so. 4. No communication is permitted. 5. All materials must be put away. 6. One hour and 45 minutes is allotted for the exam. You may take a break as needed. 7. Please submit the exams when time is called. Instructions for submission will be provided. 8. SHOW all work for partial credit. 9. Regrade requests must be submitted one week after the exam is permitted. 10. GOOD LUCK! Useful Formulas and Constants: m e = 9.11 x 10 -31 kg h = 6.626 x 10 -34 Js a o = 52.9 pm c = speed of light = 3.0 x 10 8 m/s Z eff = Z-S R H = 2.18 x 10 -18 J F = 96485 C/mole 1 C = 1 J/1V R = 8.314 J/mol K G o = -nFE o E = E o – (RT/nF) ln Q Energy = -R H (Z 2 /n 2 ) R H = -2.18 x 10 -18 J Radius = a o (n/Z 2 )
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Part I: Topics 1, 2, and 3. 1. Given a 7g orbital, identify each of the following: The Total Number of Nodes __________________________ (2) The Total Number of Angular Nodes ___________________ (2) The Total Number of Radial Nodes ____________________ (2) The Angular Momentum Quantum Number (l) __________ (2) 2. Identify the quantum numbers associated with an f-orbital in U (Z = 92). (4) n = ___________, l = __________, m l = _____________, m s = __________________. 3. Draw the Lewis structure for XeOF 4 . (5) 4. Identify the respective values for the chlorine of the following in the structure below (please note that this may or may not be the best Lewis form of the given structure). Cl O O O Number of Valence Electrons (Cl) _________________________ (1) Number of Shared Electrons (Cl) __________________________ (1) Number of Unshared Electrons (Cl) ________________________ (1) Formal Charge for (Cl) ___________________________________ (2) 5. Compute the radius of Be 3+ using Bohr’s model. (4 points) 6. Compute the ground state energy (n=1) associated with Be 3+ . (4 points)
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7.
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CHEM+1311+Summer+Final+Exam - CHEM 1311 Dr. Charlie Cox...

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