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2006 Midterm 1 Questions

2006 Midterm 1 Questions - Name Student Number CHEMISTRY...

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Name: ________________________ Student Number: _______________ CHEMISTRY 1A03/1E03 13 OCTOBER 2006 Instructors: A. Bain, J. Barbier, R. Dumont, H. Jenkins, I. Vargas-Baca MCMASTER UNIVERSITY - TERM TEST # 1 - DURATION: 100 minutes This test contains 16 numbered pages and 25 multiple-choice questions. Page 14 is extra space for rough work. Page 15 includes some useful data and equations, and there is a Periodic Table on page 16. You may tear off the last pages to view the periodic table and the data provided. 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 to 20 are each worth 2 marks, questions 21–25 are each worth 3 marks . The total marks available are 55. There is no additional penalty for incorrect answers. 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 TEST (SHOWN AT THE BOTTOM OF EACH PAGE) IN THE CORRECT COLUMN ON THE ANSWER SHEET (SEE INSTRUCTIONS ON PAGE 2). Answer all questions on the answer sheet, in pencil . Instructions for entering multiple-choice answers are given on page 2. Select one answer for each question from the choices (A) through (E). 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. Do not make contact with other students directly. Try to keep your eyes on your own paper – looking around the room may be interpreted as an attempt to copy. 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. If you have a problem please ask the invigilator to deal with it for you. Version 1 Page 1
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Name: ________________________ Student Number: _______________ QUESTIONS 1–20 ARE WORTH 2 MARKS EACH. 1. Cl 2 (g) reacts with a solution of NaBr(aq) by oxidizing bromide ions into bromine, Br 2 (aq). What volume (in mL) of chlorine gas, measured at 25.00°C and 1.00 atm, is needed to completely react with 25.0 mL of 0.100 M NaBr(aq)? A) 71.0 B) 30.6 C) 305 D) 15.2 E) 2.56 2. In a lab experiment, a student adds 10.0 mL of a 2.0 M solution of sodium hydroxide to 50.0 mL of a 0.30 M solution of copper(II) nitrate (where II represents the oxidation state of copper). When the reaction reaches completion, what mass (in grams) of copper(II) hydroxide is formed? Assume that the only reaction occurring is: Cu(NO 3 ) 2 (aq) + 2 NaOH(aq) Cu(OH) 2 (s) + 2 NaNO 3 (aq). A)
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2006 Midterm 1 Questions - Name Student Number CHEMISTRY...

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