Final answer:
Fixed oils, such as canola oil, cottonseed oil, castor oil, and whale oil, are composed of triglyceride molecules. They have distinctive odors and flavors due to the presence of fatty acids and the esterification process. Petroleum, on the other hand, is used to produce various products like gasoline and paraffin wax because of its hydrocarbon composition.
Step-by-step explanation:
Fixed oils are made from canola oil, cottonseed oil, castor oil, and whale oil. These oils are composed of molecules known as triglycerides, which are esters composed of three fatty acid units linked to glycerol. The presence of carboxylic acids and the esterification process contribute to the distinctive odors and flavors of fats and oils. Petroleum, on the other hand, is used to produce gasoline, diesel fuel, paraffin wax, and other products due to its hydrocarbon composition.