Exam 1-solutions - Version 247 Exam 1 sutcliffe (52380) 1...

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Unformatted text preview: Version 247 Exam 1 sutcliffe (52380) 1 This print-out should have 30 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points Name the compound Mg(ClO) 2 . 1. magnesium chlorate 2. magnesium hypochlorite correct 3. magnesium perchlorite 4. magnesium chlorite 5. magnesium dichlorite 6. magnesium perchlorate Explanation: 002 10.0 points Which quantum number is most important in determining the type, or shape of atomic orbitals? What would be its value for a 5 p orbital? 1. m , m = 2 2. m , m = 1 3. , = 5 4. n, n = 5 5. n, n = 1 6. , = 1 correct Explanation: 003 10.0 points Which of the following atoms has the largest radius? 1. H 2. Na correct 3. F 4. Al 5. P 6. Ar Explanation: Atomic radii increase from left to right and from top to bottom on the Periodic Table. 004 10.0 points Note: you can find helpful conversions on the back of the scantron we provide you. A pipe drips at 155 mL/min. Express this is units of gallons/day. 1. 2.34 gal/day 2. 223 gal/day 3. 58.9 gal/day correct 4. 377 gal/day 5. 15.7 gal/day 6. 942 gal/day 7. 0.223 gal/day Explanation: ? gal day = 155 mL min 1 L 1000 mL 1 gal 3 . 785 L 60 min 1 hr 24 hr 1 day = 58 . 9 gal day 005 10.0 points What is the ground state electron configura- tion of the S 2 ion? 1. 1 s 2 2 s 2 2 p 6 3 s 2 3 p 5 2. 1 s 2 2 s 2 2 p 6 3 s 2 3 p 4 3. 1 s 2 2 s 2 2 p 6 3 s 2 3 p 2 4. It is the same as the ground state config- Version 247 Exam 1 sutcliffe (52380) 2 uration of an Ar atom. correct 5. It is the same as the ground state config- uration of a Ne atom. Explanation: 006 10.0 points A particle of mass 2 . 5 10 15 kg is confined in a 1-dimensional box 13 nm long. Calculate the energy required for it to move from the n = 4 to the n = 5 energy level. 1. 1 . 764 10 3 J 2. 1 . 299 10 37 J 3. 1 . 520 10 44 J 4. 1 . 169 10 36 J correct Explanation: n 1 = 4 n 2 = 5 h = 6 . 626 10 34 J s L = 13 10 9 m m = 2 . 5 10 15 kg E = E n 2- E n 1 = ( n 2 2- n 2 1 ) h 2 8 m L 2 = (5 2- 4 2 ) (6 . 626 10 34 J s) 2 8 (2 . 5 10 15 kg) (13 10 9 m) 2 = 1 . 16904 10 36 J 007 10.0 points An electron occupies an atomic orbital that has the shape . All you can say about its four quantum numbers is 1. n = 1; = 1; m =- 1 , , +1; m s = 1 2 . 2. n = 0; = 0; m = 0; m s = 1 2 . 3. n = 2 or higher; = 1; m =- 1 , , +1; m s = 1 2 . correct 4. n = 2 or higher; = 2; m =- 2 ,- 1 , , +1 , +2; m s = 1 2 . 5. n = 1 or 2 or higher; = 1; m =- 1 , , +1; m s = 1 2 ....
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This note was uploaded on 10/20/2011 for the course CH 301 taught by Professor Fakhreddine/lyon during the Fall '07 term at University of Texas at Austin.

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Exam 1-solutions - Version 247 Exam 1 sutcliffe (52380) 1...

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