“What do you call 6.022 times 10 to the 23… wait I messed up. Why did the 6.022 times 10 to the 23rd ester get arrested? Because it was a mole-ster!”
My informant doesn’t remember where he heard this from, but it’s his favorite Chemistry joke.
This is a joke that is usually said in a casual setting between friends since it is slightly crude.
This joke is probably spread between people of higher intelligence, since it does require basic Chemistry knowledge to understand. It’s a bit crude, which is an interesting juxtaposition against the topic of Chemistry, but that’s probably why the punch line is unexpected.