http://www.ck12.org Chapter 10. The Mole
CHAPTER
10 The Mole
Chapter Outline
10.1 The Mole Concept
10.2 MASS, VOLUME,AND THEMOLE
10.3 CHEMICALFORMULAS
10.4 REFERENCES
Humans have long been interested in how much of something they have. Ancient commerce was often conducted
by trading goods for a certain weight of gold or silver. Both religious and civil statutes forbade the use of false
weights in conducting business. In chemistry, we routinely weigh materials to determine how much of a chemical
we are adding to a reaction. The amount of product is often weighed to determine reaction yield. Chemical solutions
are prepared by weighing a specified amount of material and dissolving it in a defined volume of solvent. Weight
and volume are two different ways to measure how much of a substance is present. In this chapter, we will explore
how to express amounts of materials in a way that indicates the number of atoms or molecules contained in a given
sample.
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