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.

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.