Spring 2011 Mccord Exam 1

# Spring 2011 Mccord - Version Exam 1 mccord(51600 This print-out should have 34 questions Multiple-choice questions may continue on the next column

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Version – Exam 1 – mccord – (51600) 1 This print-out should have 34 questions. Mul- tiple-choice questions may continue on the next column or page – ﬁnd all choices before answering. From Anoyomous Person: Good luck, you will need it - Mccord’s exams are impossible. To highlight that, I edited the exam so all the explan- ations and answers are omitted. Have fun! - or not. If you really want to test your skills, close your book while doing this exam. Trivial stuff: this year was snow day, classes were closed, so we only needed to test Ch.12 without the Periodic Trends. Darn, that was the easiest part. c c = λν λ = h p = h mv 1 2 mv 2 = - Φ E n = - R n 2 (hydrogen atom) ν = R p 1 n 2 1 - 1 n 2 2 P - ¯ h 2 2 m d 2 ψ d x 2 + V ( x ) ψ = ψ n ( x ) = p 2 L P 1 2 sin ± nπx L ² E n = n 2 h 2 8 mL 2 n = 1 , 2 , 3 , ··· 001 10.0 points What is the frequency of light with a wavelength of 4.0 × 10 7 m? 1. 120 s 1 2. 3 . 0 × 10 14 s 1 3. 1 . 3 × 10 15 s 1 4. 7 . 5 × 10 14 s 1 5. 3 . 0 × 10 14 s 1 Explanation: 002 10.0 points Assume n 1 and n 2 are two adjacent energy levels of an atom. The emission of radiation with the longest wavelength would occur for which two val- ues of n 1 and n 2 ? 1. 5,4 2. 7,6 3. 8,7 4. 3,2 5. 2,1 6. 6,5 7. 4,3 Explanation: -`¡Ìi`ÊÜ¡Ì¢ÊÌ¢iÊ`i£¤ÊÛiÀÃ¡¤¥Ê¤vÊ 6¡v¢ÝÊ*À£Ê*,3Ê-`¢Ì£À Ê /¤ÊÀi£¤ÛiÊÌ¢¡ÃÊ¥¤Ì¡Vi]ÊÛ¡Ã¡Ì\Ê ÜÜÜ°¡Vi¥¡°V¤£ÉÕ¥¦¤V§°¢Ì£

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Version – Exam 1 – mccord – (51600) 2 003 0.0 points If more points are awarded on this as- signment, would you like them added to your score? 1. NO, leave my score alone, I prefer the lower score, I will get 100 percent anyways. 2. YES, I am an idiot, if I get dont get it I will die - Add my score. Explanation: This should be a no-brainer. Most students want higher scores. If you picked yes, you got credit for the question and you got the extra points you asked for (if they were granted by your instructor). If you answered NO, you also got what you wanted. .. no points awarded. 004 10.0 points The radial distribution plot shown below could be from which hydrogen atom wave- function? 0 5 10 15 20 0 0 . 05 0 . 10 0 . 15 radius ( r/a 0 ) 4 πr 2 Ψ a 0 1. 2 s 2. 2 p 3. 3 d 4. 3 s 5. 1 s Explanation: 005 10.0 points Which response identiﬁes a possible ψ for the last-ﬁlled electron in a chloride ion? 1. ψ 2 , 1 , 2 2. ψ 3 , 1 , 1 3. ψ 3 , 0 , 0 4. ψ 2 , 0 , 0 5. ψ 2 , 0 , 1 6. ψ 3 , 3 , 1 Explanation: 006 10.0 points Which has a longer wavelength, a 280 nm photon or a 320 nm photon? 1. All photons have the same wavelength.
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## This note was uploaded on 02/10/2011 for the course CH 301 taught by Professor Fakhreddine/lyon during the Spring '07 term at University of Texas at Austin.

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Spring 2011 Mccord - Version Exam 1 mccord(51600 This print-out should have 34 questions Multiple-choice questions may continue on the next column

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