Soap and detergent molecules have a long, hydrophobic "tail" and a polar, hydrophilic "head." they are sometimes referred to as "bridge molecules" because they allow oils and fats to be suspended and "dissolved" in water (which they otherwise would not be able to do). Imagine that you are using soap to wash away dirt that is being held against your skin in an oily film. In this scenario, how are the soap, dirt/oil, and water arranged at the molecular level?