One liter of water and one liter of oil are united. They form an emulsion consisting of droplets of 0.6 um in diameter. It has been measured that the oil-water interface is made of one monolayer of the surfactant molecule. Assuming that one surfactant molecule occupies an area of the 18 A
( 1.8x10 -7μm2).; Determine the number of moles of surfactant in the 2 liter mix.