Order early for pre-holiday delivery. Flinn will be closed December 24th, 2025,
through January 4th, 2026, reopening Monday, January 5th, 2026.
Orders received after 10:30 AM Central Time on Tuesday, December 23rd, 2025,
will ship after we return.
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.