You can obtain a rough estimate of the size of a molecule by the following simple experiment. let a droplet of oil spread out on a smooth water surface. the resulting oil slick will be approximately one molecule thick. given an oil droplet of mass of 7.61 × 10−7 kg and density of 912 kg/m3 that spreads out into a circle of radius 43.5 cm on the water surface, estimate the diameter of an oil molecule. answer in units of m. your answer must