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# Exam 1 - Barkley Thane Exam 1 Due 11:00 pm Inst McCord This...

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Barkley, Thane – Exam 1 – Due: Sep 20 2007, 11:00 pm – Inst: McCord 1 This print-out should have 26 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. McCord 11am c = 3 × 10 8 m/s N A = 6 . 022 × 10 23 mol - 1 h = 6 . 626 × 10 - 34 J · s ν = R 1 n 2 1 - 1 n 2 2 R = 3 . 29 × 10 15 Hz E n = - h R n 2 h R = 2 . 18 × 10 - 18 J ψ n ( x ) = 2 L 1 2 sin nπx L · n = 1 , 2 , · · · E n = n 2 h 2 8 mL 2 n = 1 , 2 , 3 , · · · - ¯ h 2 2 m d 2 ψ d x 2 + V ( x ) ψ = 001 (part 1 of 1) 10 points Set(s) of possible values of m are A) - 4; - 3; - 2; - 1; 0; +1; +2; +3; +4 B) - 3; - 2; - 1; 0; +1; +2; +3 C) - 2; - 1; 0; +1; +2 D) - 1; 0; +1 E) 0 Select the best choice for n = 3. 1. only E 2. only D and E 3. only C, D, and E correct 4. only B, C, D, and E 5. only C 6. only A 7. only B 8. only D 9. A, B, C, D, and E Explanation: For any value of n , the possible values of range from 0 up to ( n - 1). In turn, for any value of , the possible values of m range from = - , ..., 0, ..., + . Since n = 3, can be 0, 1, or 2. Therefore when = 2, C) m = - 2; - 1; 0; +1; +2 when = 1, D) m = - 1; 0; +1 when = 0, E) m = 0 002 (part 1 of 1) 10 points Which has the greatest number of hydrogen atoms? 1. 100g of a substance that is 2% H by mass 2. 5 g of an unknown compound 3. 20 g of hydrogen gas correct 4. 10 20 hydrogen atoms

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