Posted by **Grant** on Tuesday, March 6, 2007 at 11:01am.

A drop of oil (volume 0.05cm3) is released from a medicine dropper on to the calm surface of a pond where it spreads out to cover an area of "40cm2". Assume that the oil film has a uniform thickness equal to the diameter of a oil molecule.

Calculate the diameter of an oil molecule and express in Scientifc notation to an appropriate number of sig figs

volume of drop = pi*r^2*thickness

You know volume, (pi*r^2=area =40 cm^2). Solve for thickness.

I don't know if im being really silly but i still do not understand fully

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