[Seraph2284]

Can anyone list these four compound's polarities from greatest to least, and tell me what makes them more/less polar?

Acetylsalicylic acid (asprin)
4-Acetamidophenol (acetaminophen)
2-(4-Isobutylphenyl) propanoic acid (Ibuprofen)
Caffeine

 http://imgur.com/6brJ8T9

[puffin0516]

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http://www.mdc.edu/learninginnovations/pages/summaries_round2/template_clip_image035.gif