chem120exam_dec09 - CHEMISTRY 120 Name:_ I.D. #_ December...

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CHEMISTRY 120 Name:_______________________ I.D. #___________________ December 2009 **************************************************************************************** This is a two (2) hour exam. Read over the entire exam before beginning. Ration your time according to the value of each question. There should be 37 different questions in this exam. If your exam copy does not contain 37 different questions notify the instructor immediately. Answer Part I (questions 1 - 30) on the multiple choice answer card. Use a black pencil to indicate your answer; press firmly on the pencil to leave a dark mark indicating your answer. Be sure to put your NAME, I.D. number and COURSE on the multiple choice answer card. Answer Part II (questions 31 - 37) in the space provided. Be sure to put your NAME and I.D. number on the exam. At the end of the exam, hand in BOTH the multiple choice answer card and the exam. It is your responsibility to insure that your answers are legible. READ ALL QUESTIONS CAREFULLY A Periodic Table is found at the end of the exam questions. Other useful data: 1 standard atmosphere = 760.0 mm Hg = 101.325 kPa. Avogadro's Number = 6.022 × 10 23 Universal gas constant R = 0.08206 L atm/(K mol) Ideal gas law: PV = nRT = 62.37 mm Hg L/(K mol) = 8.3144 L kPa/(K mol) = 8.3144 J /(K mol) For E.M. radiation, E = h ν = h c/ λ Standard molar volume = 22.414 L Speed of light c = 2.9979 × 10 8 m s -1 Planck's Constant h = 6.626 × 10 -34 J s charge on an electron = 1.602 × 10 -19 C Standard Molar Enthalpies of Formation ( H f ° ): H 2 O (l) = -286 kJ, KOH (aq) = -481 kJ ************************************************************************************* Part I. Multiple Choice. 1 mark each. Be sure to mark your answer on the card IN PENCIL 1. How many f orbitals have the value n = 3? a. 0 b. 3 c. 5 d. 7 e. 1 2. The statement that "the lowest energy configuration for an atom is the one having the maximum number of unpaired electrons allowed by the Pauli principle in a particular set of degenerate orbitals" is known as a. the aufbau principle. d. the Pauli exclusion principle. b. Hund's rule. e. the quantum model. c. Heisenberg uncertainty principle. 3. Which of the following atoms would have the largest second ionization energy? a. Mg b. Cl c. S d. Ca e. Na 4. Consider the following orderings. I. Al < Si < P < S II. Be < Mg < Ca < Sr III. I < Br < Cl < F IV. Na + < Mg 2+ < Al 3+ < Si 4+ Which of these give(s) a correct trend in atomic size? a. I b. II c. III d. IV e. II, IV 5. Which of the following elements forms the most ionic bond with chlorine? a. K b. Al c. P d. Kr e. Br 6. Which of the following ionic compounds has the largest lattice energy, i.e., the lattice energy most favorable to a stable lattice? a.
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This note was uploaded on 08/31/2010 for the course CHEM CHEM-120 taught by Professor D.klap during the Fall '10 term at St. Francis Xavier, Antigonish.

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chem120exam_dec09 - CHEMISTRY 120 Name:_ I.D. #_ December...

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