Elements generally exist as the particles we call atoms. One mole of a substance is equal to 6022 10²³ units of that substance such as atoms molecules or ions. Chapter 8 The Mole Concept Flashcards Quizlet The relationships between formula mass the mole and Avogadros number can be applied to compute various quantities that describe the composition of substances and compounds. . Chapter 10- THE MOLE Flashcards Quizlet Chemistry Chapter 10 The Mole. Chemical Formula of a Hydrate Lab Report Assistant Exercise 1. The number 6022 10²³ is known as Avogadros number or Avogadros constant. Molar mass is the total mass in grams of all the particles in one mole of a substance. Molar mass is the total mass in grams of all the particles in one mole of a substance. One mole is the amount of a pure substance that contains 602 X 10 23 representative particles. The number 60221407610 23 is popularly known as the Avogadro c...