Using the table below, calculate the average molecular weight for the triglyceri

Question

Using the table below, calculate the average molecular weight for the triglycerides. [Hint: do not simply take an average of all the molecular weights. Be sure to take the percentage of each fatty acid in the corn oil into consideration.] Make sure your answer is very clear by writing: "Triglyceride molecular weight: _________".

Molecular Weight (g/mol)

Grams per 100 g Corn Oil

Fatty Acid

Molecular Weight (g/mol)

Grams per 100 g Corn Oil

linoleic acid 280.45 57 linolenic acid 278.44 1 palmitic acid 256.42 12 stearic acid 284.48 3 oleic acid 282.46 27

Explanation / Answer

The molecular weight of triglyceride can be calculated as

{(280.45*57) + (278.44*1) + (256.42*12) + (284.48*3) + (282.46*27)}/100

= 278.21 g/mol

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