I bet you didn't know
The scientist Amedeo Avogadro.
He was a guy that died in 1856
After he discovered the mole,
Not the creature down in a hole
But a number with a very important role
The base unit for substance
That all of the chemists should know
Six point oh two times ten to the twenty-third
The largest number I've ever heard
And if Skutches taught you one thing
It's the word
Mole