Week 2 answers

Week 2 answers - 20B Week 3 1. Circle all of the molecules...

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20B Week 3 1. Circle all of the molecules below that are polar: a. CH 3 Cl b. CH 4 c. CCl 4 d. SO 2 e. CO 2 f. H 2 O g. NH 3 h. CH 3 –CH 3 i. CH 2 =CH 2 j. CH 3 OH k. CH 3 NH 2 2. Define each type of intermolecular force below. Give an example of each and describe what characteristic that example has that results in each type of intermolecular force. a. Ion-dipole: _ attractive forces between an ion and a polar molecule _____ b. Dipole-dipole: _ attractive forces between polar molecules (pure substance or mixture) ___ c. London dispersion forces: _ attractive forces between all molecules (induced dipoles uneven electron distribution _ d. Hydrogen bonding: _ attractive forces between hydrogen and nitrogen, oxygen, or fluorine __ 3. List the intermolecular forces that exist between molecules (or formula units) in each of the following. Circle the strongest force that will determine physical properties (e.g., boiling points) for each substance. CH 3 Cl __ London, dipole-dipole ________________________________________ H 2 _ London _ ________________________________________ HCl __ London, dipole-dipole ________________________________________ Ne __
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This note was uploaded on 10/26/2011 for the course CHEM 20B taught by Professor Felker during the Spring '08 term at UCLA.

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Week 2 answers - 20B Week 3 1. Circle all of the molecules...

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