Mar 27 HW-solutions - chauhan (mmc2762) Mar 27 HW sparks...

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Unformatted text preview: chauhan (mmc2762) Mar 27 HW sparks (51150) 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. For Thursdays class, preview section 9.1. Study figure 16.50 and preview the changes of state section that starts on that same page. 001 10.0 points What are the main intermolecular forces found in a liquid sample of SO 2 ? 1. ionic 2. covalent 3. dispersion 4. dipole-dipole correct 5. hydrogen-bonding Explanation: 002 10.0 points Which of the following molecules A) CH 3 CH 2 OH C) CH 3 CHO B) CH 3 OCH 3 D) CH 3 COOH are likely to form hydrogen bonds? 1. B and C only 2. Another combination of compounds 3. A and D only correct 4. A and C only 5. C and D only 6. B and D only 7. A and B only 8. None forms hydrogen bonds. 9. All are likely to form hydrogen bonds. Explanation: Only molecules with H attached to the electronegative atoms N, O, and F can hy- drogen bond. Of the molecules given, only CH 3 COOH and CH 3 CH 2 OH have hydrogen attached to oxygen, so these are the only ones that can undergo hydrogen bonding. 003 10.0 points What is the strongest evidence for hydrogen bonding? 1. Hydrogen has an extremely low elec- tronegativity. 2. Hydrogen can be considered either a metal or nonmetal. 3. Hydrogen is able to accept or donate elec- trons, so it is the most versatile atom in the periodic chart. 4. The boiling points of NH 3 , H 2 O, and HF are abnormally high compared with the rest of the hydrides in their respective periods. correct Explanation: 004 10.0 points Very weak and very short range attractive forces between temporary (induced) dipoles are called 1. cohesive forces....
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This note was uploaded on 04/03/2012 for the course CHEM 56920 taught by Professor Sparks during the Spring '12 term at University of Texas at Austin.

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Mar 27 HW-solutions - chauhan (mmc2762) Mar 27 HW sparks...

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