LS1a practice problems 1

LS1a practice problems 1 - Life Sciences 1a Practice...

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Life Sciences 1a Practice Problems 1 1. Draw the Lewis structure for the following molecules: (a) HCO 3 - (b) NH 3 (c) NO 2 + (d) CH 4 (e) CH 2 CHCl (f) NaOH 2. Draw a standard line bond structure for compounds of the following molecular formulas: (a) NH 2 CH 2 CH 2 OH (b) CH 3 CN (c) (C 6 H 5 )COOH (d) CH 3 CH 2 CH 2 OH (e) NH 2 CH 2 COOH (f) (C 6 H 5 )CN
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2 3. Provide a molecular formula for each of the following molecules. Describe the geometry at the circled carbon atoms. (a) vanillin (b) estrogen (c) cytosine O H O HO CH 3 HO OH O OH HO N N NH 2 O (d) caffeine (e) THG (“The Clear”) (f) DEET O N N N N O HO HO O N 4. Show the direction of the dipole moment in each of the following bonds using the provided electronegativity table. On which atom is most of the electron density? (a) H 3 C Br ( b) H 3 C Li
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3 5. (a) Can two molecules of ethanol (CH 3 CH 2 OH) form hydrogen bonds with each other? If so, draw a hydrogen bonding interaction between two molecules of ethanol and label
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This note was uploaded on 09/23/2008 for the course LIFESCI 1a taught by Professor Kahne during the Fall '08 term at Harvard.

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LS1a practice problems 1 - Life Sciences 1a Practice...

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