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Estimating width of molecules

  1. Jan 28, 2005 #1
    Hi, can anyone tell me how to estimate width of one stearic acid when it is in water.

    /\/\/\/\/\/\/\/\-COOH <- i want the width going up and down.
  2. jcsd
  3. Jan 29, 2005 #2


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    I'd guess it's not likely to be more than 3 or 4A wide. What kind of accuracy are you looking for ?
  4. Jan 29, 2005 #3
    I'm working on a lab that uses the amount stearic acid that covers an area of water to determine the avogadro's number. So far I've only gotten that are 10^24 instead of 10^23...I think the key is the estimate of the width of the COOH that touches the water.
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