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Ch 20: Interpreting Chemical Formulas

About This Chapter

If you need to refresh your knowledge of chemical formulas, study these convenient and engaging lessons. This chemistry chapter outlines topics that include Avogadro's number, empirical formulas, structural formula and percent composition.

Interpreting Chemical Formulas - Chapter Summary

This short yet comprehensive collection of chemistry lessons will help you identify and interpret various types of chemical formulas. You'll take a look at Avogadro's number and assess examples of structural formulas. After reviewing key definitions, you'll apply that knowledge to calculate percent composition and determine molecular and empirical formulas. After finishing the chapter's lessons, you'll be able to:

  • Identify different types of chemical formulas
  • Count atoms using the mole
  • Calculate percent composition
  • Determine empirical formulas
  • Use atoms and ions to determine molecular formulas
  • Define structural formula

Taught by expert chemistry instructors, these engaging lessons allow you to quickly study and internalize chemical formula concepts. Lessons are generally less than ten minutes long which simplifies the studying process. Each lesson comes with a short self-assessment quiz to help you check your understanding of the material as you move through the chapter. You can print out lesson transcripts for supplemental study and lessons can be reviewed as many times as needed. Your progress through the chapter is tracked on your course Dashboard and you can quickly jump to specific topics using interactive video timelines. Because these lessons are available at any time and on any computer or mobile device, it's easy to study whenever it fits your schedule, whether you're at home, at the office or on the go.

5 Lessons in Chapter 20: Interpreting Chemical Formulas
Test your knowledge with a 30-question chapter practice test
What is a Chemical Formula? - Definition, Types & Examples

1. What is a Chemical Formula? - Definition, Types & Examples

Chemical formulas provide a lot of information about chemical substances, such as how many and what atoms they are made of, as well as the way the atoms are arranged. In this lesson, we'll discuss the different types of chemical formulas.

Avogadro's Number: Using the Mole to Count Atoms

2. Avogadro's Number: Using the Mole to Count Atoms

How do we move from the atomic world to the regular world? Because atoms are so tiny, how can we count and measure them? And what do chemists celebrate at 6:02 AM on October 23rd each year? In this lesson, you will be learning how Avogadro's number and the mole can answer these questions.

Calculating Percent Composition and Determining Empirical Formulas

3. Calculating Percent Composition and Determining Empirical Formulas

Learn the difference between the empirical formula and chemical formula. Learn how to calculate the percent composition of an element in a compound. Learn how, if given a percent composition, to determine the empirical formula for a compound.

Using Atoms and Ions to Determine Molecular Formulas

4. Using Atoms and Ions to Determine Molecular Formulas

In this lesson, you will learn how atoms and ions determine molecular formulas. You will understand how molecular formulas tell information about the type and quantity of atoms involved in a molecule. Lastly, we will discuss how to write a molecular formula for an ionic compound.

Structural Formula: Definition & Examples

5. Structural Formula: Definition & Examples

Chemical compounds are made of atoms bonded together. The way the atoms are bonded together in a compound is shown by its structural formula. In this lesson, we will learn about the different types of structural formulas and look at an example for each formula.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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