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Chem Final Review

Chem Final Review - Chem 115 Final Review How to use this...

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Chem 115 Final Review How to use this review : Use this review set to assess the material you know and the find out what you don’t know. These questions cover the basic aspects of the topics we have covered in class. However, knowing the answers to these problems should NOT be considered sufficient for the exam. If you are not able to do some of the problems, then go back and study the entire section on that topic, focusing on the learning objectives in the appropriate weeks, the readings, and the lectures. You should also be able to do the sample lab problems on the course website. Constants: R = 8.314 J/mol K = 0.0821 L atm/mol K h = 6.626 x 10 −34 J s c = 3.0 x 10 8 m/s 1 mol = 6.02 x 10 23 item Some potentially helpful equations PV = nRT k = 0.693/t 1/2 ln(N 0 /N) = k t E = h ν = hc/ λ Bohr energy levels of a hydrogen like atom: E = -C/n 2 where C is the Bohr constant NUCLEAR CHEMISTRY 1. Give the products that would be obtained upon alpha and beta decay of the following nuclei: a) 212 Bi b) 221 Rn c) 222 Fr d) 253 Cf 2. What is the product of the following fission reaction? 239 Pu + 1 n 144 Ce + ______ + 2 1 n 3. One fission reaction of 235 U, produces 160 Sm, three neutrons and another nuclide. What is the other nuclide? 4. The half-life for beta decay of 128 Sb is 9.1 hours. How long will it take for 90% of it to decay? Page 1
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ATOMIC STRUCTURE 5. The visible spectrum ranges from about 400 nm to 750 nm. What is the range of photon energies for visible radiation? 6. Which of the following transitions in hydrogen atom involves the absorption of the largest amount of energy? a) n=1 to n=2 b) n=2 to n=1 c) n=2 to n=3 d) n=3 to n=2 7. Provide the electron configurations for the atoms and ions below. Provide a Lewis dot representation for each, indicating the number of valence electrons.
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Chem Final Review - Chem 115 Final Review How to use this...

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