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Exam (elaborations)

CHEM 151 Exam 5 with complete solutions

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CHEM 151 Exam 5 with complete solutions

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CHEM 151 Exam 5 with complete |! |! |! |! |! |!




solutions


1.What are the three states of
|! |! |! |! |! |!




matter?: solids liquids
|! |!




gasses


2.What is the main diffrence between the states of matter?: the
|! |! |! |! |! |! |! |! |! |! |!




distance of the particles (close in liquids and solids, far in
|! |! |! |! |! |! |! |! |! |! |!




gasses)


3.What are intramolecular forces?: forces that hold the atoms
|! |! |! |! |! |! |! |! |!




together


4.What are intermolecular forces?: forces between two or
|! |! |! |! |! |! |! |!




more molecules or atoms
|! |! |!




1 |! / |!
15

, 5.How are intramolecular bonds drawn?: as solid lines
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6.How are intermolecular bonds drawn?: as dashed lines
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7.Intermolecular forces are |! |! |! than intramolecular forces:
|! |! |!




weaker


8.The stronger the attractive forces, the
|! |! |! |! |! |! the temperature |! |!




at which a liquid boils: higher
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9.What are the three types of intermolecular forces?:
|! |! |! |! |! |! |! |!




dipole-dipole london dispersion forces |! |! |!




hydrogen bonding |!




10.Where are dipole-dipole forces present?: polar molecules
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11.Where are london dispersion forces present?: nonpolar
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molecules and noble gasses |! |! |!




12.Are London dispersion forces weak or strong?: weak
|! |! |! |! |! |! |!




2 |! / |!
15

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