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Topic: the weakest cohesive forces  (Read 2795 times)

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Offline oceanmd

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the weakest cohesive forces
« on: November 09, 2010, 03:30:27 PM »
Which has the weakest cohesive forces: H2O,CH3Cl, KCl, O2, Au
My solution: It is either CH3Cl or O2 because they are both gases. Now, O2 has smaller molar mass. Is this the correct answer?

Thank you
 
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Offline JustinCh3m

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Re: the weakest cohesive forces
« Reply #1 on: November 09, 2010, 06:08:34 PM »
well, which one of these is nonpolar?:  CH3Cl or O2

If they were both nonpolar and they both exhibited LDF forces (or van der Waals forces), then molar mass (or more appropriately, total # of electrons and polarizability) would come into play
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Offline oceanmd

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Re: the weakest cohesive forces
« Reply #2 on: November 09, 2010, 10:20:56 PM »
Thank you, O2 is nonpolar, so it has the weakest cohersive force
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