15. Some molecules that are covalently bonded do not have a difference in charge across the mol- ecule. These molecules are referred to as nonpolar. What arrangement of electrons would result in a nonpolar molecule? 16. Some examples of nonpolar molecules include fats, oils, and waxes. How do these substances interact with water? 17. What prediction would you make about why oil and water interact in the way described above?

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Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.