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Exam107_answers - Exam 1 Chemistry 2401(16 I The answer to...

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Exam # 1 Chemistry 2401 – September 25, 2007 (16) I. The answer to each of the following is a number. Place the correct number in the space provided. __12__ A. The number of protons in a Mg +2 ion. __5__ B. The number of outer shell electrons in an atom of phosphorus (At # = 15). ___2__ C. The number of half-filled orbitals in a sulfur atom (At # = 16). _ -1 _ D. The formal charge on a nitrogen atom that has two bonds and two nonbonded electron pairs (include sign). __18__ E. The number of hydrogen atoms in the molecule shown at the right. __5_ F. The active ingredient in Tylenol has a molecular formula of C 8 H 9 NO 2 . How many nonbonded electron pairs are there in a molecule of this substance? _6_ G. The number of π electrons in the molecule at the right. _120 o _ H. What is the carbon-carbon-chlorine bond angle in CH 2 = CH – Cl? (12) II. It is possible to draw structural formulas for a large number of isomeric compounds all of which have a molecular formula of C 5 H 10 O. Draw structural formulas below for such compounds that contain the indicated functional group. A. an aldehyde B. an unsaturated alcohol CH 3 CH 2 CH 2 CH 2 C H O CH 2 CH CH 2 CH 2 CH 2 OH C. a cyclic ether D. a ketone O CH 3 CH 3 CH 2 C O CH 2 CH 3 (4) III. When the compound shown below is boiled with aqueous NaOH, two new compounds (an acid and an amine) are formed. No other functional group is affected.
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