Thursday
March 5, 2015

Homework Help: Chemistry

Posted by Amy~ on Tuesday, August 24, 2010 at 11:52am.

In water conservation, chemists spread a thin film of certain inert material over the surface of water to cut down the rate of evaporation of water in reservoirs. Franklin found that 0.10 mL of oil could spread over the surface of water of about 49 m squared in area.
Assuming that the oil forms a monolayer (one molecule thick) estimate the length of each oil molecule in nanometers.
(1nm= 1 x 10^-9 m)

I tried solving this but I'm stuck.
This is what I did 0.10/40 than /1x 10^-9 = 2.5 x10^6 as my answer

but the real answer is 2.5 nm

Could someone please write the steps to getting 2.5 nm.

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