Exam 2 F 11 Form Code A DRC

Exam 2 F 11 Form Code A DRC - CHM 2045 Exam 2 CH 7, 8, 9,...

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CHM 2045 Exam 2 CH 7, 8, 9, 10, and 11 (Gower/Mitchell/Williams) (Form Code A) Fall 2011 Instructions: This exam contains 25 questions worth 10 points each. On your Scantron sheet enter and bubble in your name, UF ID number (start on the leftmost space and leave any extra spaces blank), and Form Code (see above). You may retain your exam sheet (mark your answers on it and the Scantron sheet) and any other sheets. Turn in only your Scantron. Check your bubbling carefully – deductions for bubbling errors will not be negotiated. Potentially Useful Information: R = 1.097x10 7 m –1 R·h·c = 2.18x10 –18 J 1. The visible part of the hydrogen atom spectrum is called the Balmer series (n 1 = 2). The violet line has a wavelength of 410.2 nm. What is the initial energy level (n 2 ) of the electron for this transition? (1) 1 (2) 2 (3) 3 (4) 4 (5) 6 2. Which of the following statements is true? (1) According to the Bohr model, an atomic spectrum consists of separate lines because an atom has certain allowed orientations in space. (2) Quantum numbers n, l, and m l are important in determining the size, shape, and orientation, respectively, of an atomic orbital. (3) The Pauli Exclusion Principle states that no two electrons in neighboring atoms can have the same set of four quantum numbers. (4) The Heisenberg Uncertainty Principle states that it is impossible to determine accurately both the momentum and the energy of a particle simltaneously. (5) According to Hund's Rule, a ground-state [Ne]4s 2 3 p 2 electron configuration has two paired electrons with opposite spins in the same 3 p orbital. 3. A microwave oven operating at 1.72 x 10 3 μm is used to heat 243. g of water from 25°C to 90°C. How many of these photons must be absorbed ? (Specific heat capacity of water = 4.184 J/g•°C) (1) 3.1 x 10 28 (2) 3.1 x 10
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Exam 2 F 11 Form Code A DRC - CHM 2045 Exam 2 CH 7, 8, 9,...

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