# Chapter 2 - Exercises - Page 78: 27

A mole is a unit that is defined by the amount of material containing 6.022 x 10$^{23}$ particles. 6.022 x 10$^{23}$ is Avogadro's number. The mole is useful for converting: (1) from a number of moles to a number of atoms and vice versa (2) from mass to a number of moles and vice versa.

#### Work Step by Step

A mole is a unit that is defined by the amount of material containing 6.022 x 10$^{23}$ particles. 6.022 x 10$^{23}$ is Avogadro's number. The mole is useful for converting: (1) from a number of moles to a number of atoms and vice versa (2) from mass to a number of moles and vice versa.

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.