Irving Langmuir received the Nobel Prize in Chemistry in 1932 for his work on “monomolecular” films that are assumed to have a thickness of one molecule. In the Measuring the Size of a Molecule: Structure and Bonding Demonstration—ChemTopic™ Lab Activity, use a method similar to his to determine the approximate length of a fatty acid molecule. Available as part of the Atomic and Electron Structure—ChemTopic™ Labs digital collection. Click the Price link for digital collection pricing.