Solved cryptogram
A mole counts particles rather than weighing them, and the count it names never changes.
Physics Facts, sourced to NIST.
Or go to the puzzle’s own page first.
What it means
Chemists needed a way to talk about huge numbers of atoms without writing out the zeros, so they gave one particular huge number a name. A mole of anything is the same count of things, whether those things are atoms of gold or molecules of water. The unit used to be tied to a mass of carbon; it is now simply the number itself, which makes it a pure counting unit like a dozen.
The claim comes from NIST.
- SourceNIST
- CollectionPhysics Facts
- Difficultymedium
- Length72 letters, 18 unique
Nearby in the collection
The facts either side of this one.
About as hard as this one
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