Quote:
Originally posted by chilicheese01
I guess because the extra oxygen atom makes it that much heavier, causing its dispersion forces to increase. ![@michael.](http://img.photobucket.com/albums/v232/korn0818/ATRL_Smilies_All/atrlers/micheal_zps45ccf519.gif) I guess that's just one you gotta memorize.
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I've not learnt about dispersion forces yet
![too funny](images/smilies/images/smilies/priceless.gif)
But oh well, thanks for your help!
EDIT: Ok I found the answer key, it says because SO3 has a larger electron cloud. Do they mean the same thing?