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Chapter 10: The Mole

Created by: CK-12

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Chapter Overview

The counting unit of the mole is the unit used by chemists to account for the number of representative particles participating in reactions. One mole is always equal to 6.02 × 1023. The molar mass of a substance is the mass in grams of one mole of particles of that substance. Calculations can be done to convert back and forth between moles and mass, volume of a gas, or the number of particles. Percent composition is the percent by mass of elements in a compound. The empirical and molecular formulas of compounds can be determined from percentage composition data and the molar mass.

Online Resources

See the following Web sites for appropriate activities:

Pacing the Lessons

Lesson Class Period(s) (60 min)
10.1 The Mole Concept 1 – 2
10.2 Mass, Volume, and the Mole 2
10.3 Chemical Formulas 2

Chemistry Concepts

The table below matches each lesson from the flexbook to the Chemistry Concepts.

Flexbook Lesson Chemistry Concepts
10.1 The Mole Concept 10.1 – 10.3
10.2 Mass, Volume, and the Mole 10.4 – 10.9
10.3 Chemical Formulas 10.10 – 10.13

Chapter Outline

Chapter Summary

Image Attributions


Difficulty Level:

At Grade


Date Created:

Jul 25, 2014

Last Modified:

Oct 20, 2014
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