About This Chapter
How it works:
- Identify the lessons in the Holt Chemistry: The Mole and Chemical Composition chapter with which you need help.
- Find the corresponding video lessons within this companion course chapter.
- Watch fun videos that cover the mole and chemical composition topics you need to learn or review.
- Complete the quizzes to test your understanding.
- If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.
Students will learn:
- Avogadro's number
- Average atomic mass and isotopes
- Use of atoms and ions to determine molecular formulas
- Calculations of percent composition and determination of empirical formulas
Holt Chemistry is a registered trademark of Holt, Rinehart and Winston, which is not affiliated with Study.com.
1. 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.
2. Isotopes and Average Atomic Mass
When you drink a glass of water, you are actually drinking a combination of heavy water and light water. What's the difference? Is it harmful? This video will explain the difference between the two types of water and go into detail on the significance of the different isotopes of elements.
3. 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.
4. 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.
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Other chapters within the Holt Chemistry: Online Textbook Help course
- Holt Chemistry Chapter 1: The Science of Chemistry
- Holt Chemistry Chapter 2: Matter and Energy
- Holt Chemistry Chapter 3: Atoms and Moles
- Holt Chemistry Chapter 4: The Periodic Table
- Holt Chemistry Chapter 5: Ions and Ionic Compounds
- Holt Chemistry Chapter 6: Covalent Compounds
- Holt Chemistry Chapter 8: Chemical Equations and Reactions
- Holt Chemistry Chapter 9: Stoichiometry
- Holt Chemistry Chapter 10: Causes of Change
- Holt Chemistry Chapter 11: States of Matter and Intermolecular Forces
- Holt Chemistry Chapter 12: Gases
- Holt Chemistry Chapter 13: Solutions
- Holt Chemistry Chapter 14: Chemical Equilibrium
- Holt Chemistry Chapter 15: Acids and Bases
- Holt Chemistry Chapter 16: Reaction Rates
- Holt Chemistry Chapter 17: Oxidation, Reduction, and Electrochemistry
- Holt Chemistry Chapter 18: Nuclear Chemistry
- Holt Chemistry Chapter 19: Carbon and Organic Compounds
- Holt Chemistry Chapter 20: Biological Chemistry