Write the structure of each of the following compounds.

Fatty acids are molecules with a carboxylic acid on one end and long hydrocarbon chain on the other. The sodium salts of fatty acids (such as sodium strearate, shown below) are commonly used in soaps to trap nonpolar dirt and grease particles. Soap does not work well in "hard water, which is water with high concentration of magensium and calcium ions (often found in water obtained from wells) Explain this observation at a molecular level.

Find the functional group and the classification/organic group of the following molecules, an example is shown in the table:

Drawthe characteristic functional group of FOUR of the following six families of organic compounds: Alcohol, Amine, Aldehyde, Ketone, Carboxylic acid, or Ester.