Final-exam-2009 - Name: _ Student Number: _ CHEMISTRY 1E03...

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Name: ____________________________ Student Number: _______________ Version 1 Page 1 continued on next page…. CHEMISTRY 1E03 10 DECEMBER 2009 McMASTER UNIVERSITY - FINAL EXMINATION DURATION: 3 HOURS Instructor: J. Barbier This examination paper contains 21 pages and 35 multiple-choice questions . The last pages include extra blank pages for rough work, a page with some useful data and equations, and a Periodic Table. You may tear off the last five pages. You are responsible for ensuring that your copy of the question paper is complete . Bring any discrepancy to the attention of your invigilator. Questions 1-25 are each worth 2 marks, questions 26-35 are each worth 3 marks. There is no penalty for incorrect answers. Answer all questions on the answer sheet, in pencil . Instructions for entering multiple-choice answers are given on page 2. Select one answer only for each question. These question sheets must be returned with your answer sheet. However, no work written on the question sheets will be marked . You must enter your full name and student number on this question sheet, as well as on the answer sheet. Your invigilator will be checking your student card for identification. Make sure to enter the correct version number of your examination (shown at the bottom of each page) in the correct column on the answer sheet (see instructions on page 2). Only Casio FX 991 electronic calculators may be used; but they must NOT be transferred between students. Use of periodic tables or any aids other than those provided, is not allowed. Note: Academic dishonesty may include, among other actions, communication of any kind (verbal, visual, etc.) between students, sharing of materials between students, copying or looking at other students’ work.
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Student Number: _______________ Version 1 Page 2 continued on next page…. QUESTIONS 1–25 ARE WORTH 2 MARKS EACH. 1. Identify the false statement(s): (i) (3, 2 , -1, -1/2) is an allowed set of quantum numbers for a 3d electron. (ii) The ground-state electron configuration of the sulfide anion (S 2- ) has two unpaired electrons. (iii) On average, a 3p electron in an Al atom is closer to the nucleus than a 3s electron. (iv) The (1s 2 2s 2 2p 6 3s 2 3p 1 ) electron configuration represents the ground state of the Si + cation. (v) The first ionization energy of potassium is smaller than that of sodium. A) ii, iii B) i, iv C) iv, v D) v E) ii 2. Select the true statement for the reaction of 15.0 g of magnesium metal and 5.00 g of nitrogen gas according to 3 Mg + N 2 Mg 3 N 2 A) Nitrogen gas is the limiting reagent and 5.00 g of Mg 3 N 2 is produced. B)
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Final-exam-2009 - Name: _ Student Number: _ CHEMISTRY 1E03...

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