What are number of molecules?

A number of molecules is just how many tiny invisible pieces make up something you can see or touch.

Imagine you have a big bag of jellybeans. Each jellybean is like a molecule, a tiny piece that makes up the whole bag. If you count all the jellybeans, that’s the number of molecules in the bag!

If you have 10 jellybeans, that means there are 10 molecules in your hand (if each one was a molecule). If you had a whole jar full, that would be like having hundreds or even thousands of molecules, all inside something small enough to hold in your hand.

Even the air around you has molecules. They’re so tiny, you can’t see them, but they’re always moving and bouncing off each other, just like how jellybeans move when you shake up a bag!