You can find a rough estimate of the size of a molecule by the following simple experiment. Let a droplet of oil spread out on a smooth surface of water. The resulting oil slick will be about one molecule thick. Given an oil droplet of mass 1.0 x 10^-6 kilogram and density 1422 kg/m^3 that spreads out into a circle of radius 41.8 centimeter on the water surface, find the magnitude of the diameter of an oil molecule?