Which task most likely involves a calculation that uses moles? measuring a sugar sample on a balance
counting the number of jellybeans in a jar
determining the number of atoms in a jar of liquid
finding the rate of expansion of a gas-filled balloon

determining the number of atoms in a jar of liquid

Explanation:

In determining the number of atoms that makes up a substance, the number  of moles is very essential.

The mole is the convenient unit of quantity of particles. It can be likened to a quantity of things in everyday life like a dozen, a score and a gross.

So, to find the number of atoms, we must know the number of moles.

2b2t

explanation:

2b2t