A teaspoon of an organic oil dropped on the surface of a quiet pond spreads out to cover almost an acre. The oil film has a thickness equal to the size of a molecule. In the lab, when you drop 0.001 milliliter(10-9 m3) of the organic oil on the still surface of water, you find that it spreads to cover an area of 1.0 m2. If the layer is one molecule thick, what is the size of a single molecule?