Cooking oil and gasoline (a hydrocarbon) have no affinity for water because they

Answer;

Do not have a polar or charged region.

Cooking oil and gasoline (a hydrocarbon) have no affinity for water because they do not have a polar or charged region.

Explanation;

An amphipathic molecule is a molecule that contains both polar and nonpolar regions. Answer As the answer above said amphipathic molecules have two ends. A Hydrophilic end or a polar end, and a hydrophobic end or a non-polar end. Amphipathic molecules are extremely important in the human body. because they function as transporters of hydrophobic material in the hydrophilic environment of the body.

A simple example is that lipids (fat) can not circulate the body along with blood unless it is bonded to an amphipathic molecules or else lipids will not be able to move in the vessels and will make obstructions.