Question

how many molecules of stearic acid are needed to make one molecule of stearin?

Explanation:

Step1: Recall the structure of stearin and stearic acid

Stearin is a triglyceride. A triglyceride is formed by the reaction of glycerol with three fatty - acid molecules. Stearic acid is a fatty acid.

Step2: Determine the number of stearic acid molecules

Since stearin is a triglyceride, it is made up of one glycerol molecule and three stearic acid molecules.

Answer:

3