* Biodiesel isn't made from a single oil molecule. It's made from triglycerides, which are large molecules composed of glycerol and three fatty acid chains.

* The number of biodiesel molecules depends on the specific triglyceride. Different oils have different fatty acid compositions, impacting the number of biodiesel molecules produced.

However, here's the general idea:

* One triglyceride molecule yields three biodiesel molecules. This is because each of the three fatty acid chains in a triglyceride is converted into a biodiesel molecule.

* The process involves transesterification: This chemical reaction replaces the glycerol backbone of the triglyceride with an alcohol (typically methanol or ethanol), resulting in the formation of biodiesel and glycerol.

So, you can't say definitively how many biodiesel molecules come from "one molecule of oil" because "oil" is a broad term. It would be more accurate to say that one triglyceride molecule yields three biodiesel molecules.