Things to Know from Chapter 5 Chemical Accounting Chapter Outline 51 Chemical Sentences: Equations Remember that matter is neither created nor destroyed in chemical reactions, and chemical equations and the balancing of chemical equations make sense. Know how to balance chemical equation 5.3 Avogadro's Number: 6.02 x 1023 What does this number mean? 5.4 The Mole: “A Dozen Eggs and a Mole of Sugar, Please.” Given mass (and calculating molar mass) can you calculate the number of moles? Given mole, can you calculate the mass of the compound? Don’t worry about P. 135-136 Section 5.5 Solution concentrations (Molarity and Percent Concentrations) 53