Chem012Spring 2001 - Chemistry 12 Exam I Form A February 7...

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1 Chemistry 12 Name ____________________ Exam I Form A Section ____________________ February 7, 2001 Student No. ____________________ IMPORTANT : On the scantron (answer sheet), you MUST clearly fill your name , your student number , section number , and test form (white cover = test form A; yellow cover = test form B). Use a #2 pencil. There are 26 questions on this exam. Check that you have done all of the problems and filled in the first 26 bubbles on the scantron. The maximum score on this exam is 20 points. Exam policy Calculators with text-programmable memory are not allowed. Relevant data and formulas, including the periodic table, are attached at the end of this exam. Your grade will be based only on what is on the scantron form. The answer key will be posted on the web after the exam (under "News"). Hints As you read the question, underline or circle key words to highlight them for yourself. Avoid errors from "mis-reading" the question. There is no penalty for guessing. 2 CHEM 12, Exam I February 7, 2001 Form A ------------------------------------------------------------------------------------------------------------ 1. What is the correct IUPAC name of the following alkane? a. 4-isobutyl-2,2-methylhexane b. 2,3-diethyl-5,5-dimethylhexane c. 4-ethyl-2,2,5-trimethylheptane d. 4-ethyl-2,2-dimethyloctane e. 4-ethyl-3,6,6-trimethylheptane ------------------------------------------------------------------------------------------------------------ 2. Which of the following molecules would you expect to react with Br 2 in an addition reaction? ------------------------------------------------------------------------------------------------------------ CH 3 CH 3 -C-CH 2 -CH-CH 2 -CH 3 CH 3 CH-CH 2 -CH 3 CH 3 Cl Cl I) II) III) IV)
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3 ------------------------------------------------------------------------------------------------------------ 3. According to the following balanced chemical reaction, how much of CaCl 2 must be combined with an excess of AgNO 3 to produce 100 g of AgCl? CaCl 2 (aq) + 2 AgNO 3 (aq) Ca(NO 3 ) 2 (aq) + 2 AgCl (s) ------------------------------------------------------------------------------------------------------------ 4. What is the weight percentage of nitrogen in urea [(NH 2 ) 2 CO]? a. 46.7% b. 31.8% c. 23.3% d. 48.3% e. 63.6% ------------------------------------------------------------------------------------------------------------
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