Avogadro's Number Khan Academy

The mole and Avogadro's number. Stoichiometry example problem 1. Khan Academy is a 501(c)(3) nonprofit organization. Donate or volunteer today! Site Navigation.
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Molar Mass And Avogadro's Number
Avogadro's Number Khan Academy Student
Avogadro's Number Khan Academyy
Khan Academy Molar Mass

Molar Mass And Avogadro's Number

Avogadro's Number Khan Academy Student

Course Resources

CHEMISTRY A

WEEK 1: MATTER; MEASUREMENT

Lesson Supplements

Discovery Education Video: Chemistry Basics: Matter*

Virtual Labs
Self-Check Quizzes

Section 1-2: Chemistry and Matter
Section 2-1: Units of Measurement
Section 3-1: Properties of Matter
Section 3-2: Changes in Matter

WEEK 2: MIXTURES; ATOMIC STRUCTURE

Lesson Supplements

Discovery Education Video: Atomic Theory and Structure*
Khan Academy: Introduction to the Atom

Virtual Labs
Self-Check Quizzes

Section 3-3: Mixtures of Matter
Section 4-2: Subatomic Particles and the Nuclear Atom
Section 4-3: How Atoms Differ
Section 4-4: Unstable Nuclei and Radioactive Decay

WEEK 3: ELECTRONS IN ATOMS; THE PERIODIC TABLE

Lesson Supplements

Virtual Labs
Self-Check Quizzes

Section 5-1: Light and Quantized Energy
Section 5-2: Quantum Theory and the Atom
Section 5-3: Electron Configurations
Section 6-1: Development of the Modern Periodic Table

WEEK 4: PERIODIC TABLE; THE ELEMENTS; CHEMICAL BONDS

Lesson Supplements

Dynamic Periodic Table
Khan Academy: Groups of the Periodic Table

Virtual Labs
Self-Check Quizzes

Section 6-2: Classification of the Elements
Section 6-3: Periodic Trends
Section 7-2: Properties of p-Block Elements
Section 8-1: Forming Chemical Bonds

WEEK 5: IONIC, METALLIC, AND COVALENT BONDS

Lesson Supplements

Discovery Education Video: Bonds and Molecular Structure*
Khan Academy: Ionic, Covalent, and Metallic Bonds

Virtual Labs
Self-Check Quizzes

Section 8-2: The Formation and Nature of Ionic Bonds
Section 8-3: Names and Formulas of Ionic Compounds
Section 8-4: Metallic Bonds and Properties of Metals
Section 9-1: The Covalent Bond

WEEK 6: MOLECULES; POLARITY

Lesson Supplements
Virtual Labs
Self-Check Quizzes

Section 9-2: Naming Molecules
Section 9-3: Molecular Structures
Section 9-4: Molecular Shape
Section 9-5: Electronegativity and Polarity

WEEK 7: CHEMICAL REACTIONS; THE MOLE

Lesson Supplements
Virtual Labs

SAS VLab: Chemical Equations*

Self-Check Quizzes

Section 10-1: Reactions and Equations
Section 10-2: Classifying Chemical Reactions
Section 10-3: Reactions in Aqueous Solutions
Section 11-1: Measuring Matter

WEEK 8: THE MOLE; STOICHIOMETRY

Lesson Supplements

Discovery Education Video: Stoichiometry*
Khan Academy: Stoichiometry (Chemical Reactions)

Virtual Labs
Self-Check Quizzes

Section 11-2: Mass and the Mole
Section 11-3: Moles of Compounds
Section 12-1: What is Stoichiometry?
Section 12-2: Stoichiometric Calculations

WEEK 9: REACTANTS; GASES, FORCES OF ATTRACTION

Lesson Supplements
Virtual Labs

SAS VLab: Limiting Reactants*

Self-Check Quizzes

Section 12-3: Limiting Reactants
Section 12-4: Percent Yield
Section 13-1: Gases
Section 13-2: Forces of Attraction

WEEK 10: PHASE CHANGES; GAS LAWS

Lesson Supplements

Virtual Labs

SAS VLab: Gas Laws*

Self-Check Quizzes

Section 13-4: Phase Changes
Section 14-1: The Gas Laws
Section 14-2: The Combined Gas Law and Avogadro's Principle
Section 14-3: The Ideal Gas Law

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CHEMISTRY B

WEEK 1: SOLUTIONS; ENERGY

Lesson Supplements

Discovery Education Video: Solutions*
Khan Academy: Suspensions, Colloids, and Solutions

Virtual Labs

SAS VLab: Solution Properties*
SAS VLab: Measures of Concentration*

Self-Check Quizzes

Section 15-1: What are solutions?
Section 15-2: Solution Concentration
Section 15-3 Colligative Properties of Solutions
Section 16-1: Energy

WEEK 2: ENERGY AND CHEMICAL CHANGE

Lesson Supplements

Discovery Education Video: Chemical Reactions and Equilibrium*

Virtual Labs

SAS VLab: Electron Transitions*
SAS VLab: Calorimetry*

Self-Check Quizzes

Section 16-2: Heat in Chemical Reactions and Processes
Section 16-3: Thermochemical Equations
Section 16-4: Calculating Enthalpy Change
Section 16-5: Reaction Spontaneity

WEEK 3: REACTION RATES; CHEMICAL EQUILIBRIUM

Lesson Supplements
Virtual Labs
Self-Check Quizzes

Section 17-1: A Model for Reaction Rates
Section 17-2: Factors Affecting Reaction Rates
Section 18-1: Equilibrium: A State of Dynamic Balance
Section 18-2: Factors Affecting Chemical Equilibrium

WEEK 4: EQUILIBRIUM CONSTANTS; ACIDS AND BASES

Lesson Supplements

Discovery Education Video: Acids and Bases*
Khan Academy: Acids and Bases

Virtual Labs

SAS VLab: Acid-Base Chemistry*

Self-Check Quizzes

Section 18-3: Using Equilibrium Constants
Section 19-1: Acids and Bases: An Introduction
Section 19-2: Strengths of Acids and Bases
Section 19-3: What is pH?

WEEK 5: NEUTRALIZATION; REDOX REACTIONS

Lesson Supplements
Virtual Labs
Self-Check Quizzes

Section 19-4: Neutralization
Section 20-1: Oxidation and Reduction
Section 20-2: Balancing Redox Equations
Section 20-3: Half-Reactions

WEEK 6: ELECTROCHEMISTRY; ALKANES

Lesson Supplements
Virtual Labs
Self-Check Quizzes

Section 21-1: Voltaic Cells
Section 21-2: Types of Batteries
Section 22-1: Alkanes
Section 22-2: Cyclic Alkanes and Alkane Properties

WEEK 7: HYDROCARBONS

Lesson Supplements
Virtual Labs
Self-Check Quizzes

Section 22-3: Alkenes and Alkynes
Section 22-4: Isomers
Section 22-5: Aromatic Hydrocarbons and Petroleum
Section 23-2: Alcohol, Ethers, and Amines

WEEK 8: MORE HYDROCARBONS; PROTEINS

Lesson Supplements
Virtual Labs
Self-Check Quizzes

Section 23-3: Carbonyl Compounds
Section 23-4: Other Reactions of Organic Compounds
Section 23-5: Polymers
Section 24-1: Proteins

WEEK 9: CARBOHYDRATES, LIPIDS, AND NUCLEIC ACIDS

Lesson Supplements
Virtual Labs
Self-Check Quizzes

Section 24-2: Carbohydrates
Section 24-3: Lipids
Section 24-4: Nucleic Acids
Section 25-1: Nuclear Radiation

WEEK 10: NUCLEAR CHEMISTRY

Lesson Supplements
Virtual Labs
Self-Check Quizzes

Section 25-2: Radioactive Decay
Section 25-3: Transmutation
Section 24-4: Fission and Fusion of Atomic Nucei
Section 25-5: Applications and Effects of Nuclear Reactions

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Fundamentals

Subject	Websites	Videos
Atomic Mass Units	Definition, Colorado Education Explanation	Explanatory Video
Avogadro's Number	Britannica Definition, Chem1 Explanation with Example Problems	Khan Academy Introduction
Balancing Chemical Equations	PhET Introduction and Simulation, Jefferson Lab Practice, 10-Step Process Explanation	Khan Academy Introduction, Explained Practice Problems, Introduction to Balancing Chemical Equations
Chemical Equations: An Overview	Vision Learning Explanation, Interactive Review	How to Write Chemical Equations, Another Explanation Involving Writing Equations
Classification of Matter	Pren Hall Discussion with Diagrams, Chemogenesis Explanation and Graphic Organizer	The Science Classroom Explanation
Compounds/Elements/Molecules	Straight-Forward Discussion, Simple Definitions, Relationships Between Elements, Molecules, and Compounds	Relationships Between Elements, Atoms, and Molecules, Khan Academy Elements and Atoms, Bill Nye Explanation
Density	Vision Learning Explanation, PhET Simulation	Density Practice Problems, Bozeman Science Explanation
Empirical and Molecular Formulas	Sample Calculations, Step by Step Explanation and Sample Problems	Khan Academy Explanation, Calculating Molecular Formula from Empirical Formula
Fundamental Chemical Laws	PDF Explanation with Examples	Crash Course Overview
Gravimetric Analysis	Overview with Example Problems, Britannica Definition, Wired Chemist Lab Application	Explanatory Example Problem
History of the Atom	Concise Timeline, Detailed Explanation with Diagrams	Brief Crash Course Overview, The Science Classroom Explanation, Models of the Atom TImeline
Ions	Northwestern Definition	What's an Ion?, Alternate Explanation of Ions
Limiting Reactants	Explanation with Example Problems, Chem Team Explained Example Problems	Introduction to Limiting Reactant and Excess Reactant, Explained Practice Problem
Metric Units and Prefixes	Table Outline, Binary Prefixes
Moles	Britannica Definition, Vision Learning Overview	Introduction to Moles, Khan Academy: The Mole and Avogadro's Number, Bozeman Science Mole Conversions,Mole Ratio Practice Problem Explanations, Converting Between Moles, Atoms, and Molecules
Molar Mass	Overview and Explained Problems, Definition, Formula, and Examples	How to Calculate Molar Mass, Chemistry Lesson Explanation
Naming Covalent Compounds	Explained Rules and Practice Problems, Naming Binary Covalent Compounds	Explanatory Tutorial, Brightstorm Examples
Naming Ionic Compounds	Khan Academy: Naming Monatomic Ions and Ionic Compounds, Clear Rules and Explained Examples	Naming Ionic Compounds with Transition Metals, Introduction to Writing Ionic Formulas, Explanation of Naming Ionic Compounds Through Examples
Complete Molecular, Complete Ionic, and Net Ionic Equations, and Spectator Ions	Khan Academy Explanation and Practice Problems, Chem Team Outline, Practice Problems with Solutions	Bozeman Science Explanation
Percent Composition of Compounds	Definition and Explained Example Problems, Calculating Percent Composition and Determining Empirical Formulas	Percent Composition by Mass Tutorial, Explanation with Practice Problems
Polyatomic Ions	Khan Academy: Definition, Structure, Naming, and Example Calculations, Polyatomic Ions: Names, Formulas, and Shapes	What is a Polyatomic Ion?, Writing Formulas with Polyatomic Ions
Radioactivity/Radioactive Decay	Atomic Notation, Alpha, Beta, and Gamma Decay, Writing Nuclear Equations, and Half-Life, Khan Academy: Writing Nuclear Equations for Alpha, Beta, and Gamma Decay, and Half-Life	Crash Course Overview, Khan Academy: Types of Decay, Nuclear Half-Life: Introduction and Explanation, Writing Nuclear Equations for Alpha, Beta, and Gamma Decay
Scientific Notation	Explanation and Practice Problems, Explained Practice Calculations	A Chemical Introduction to Scientific Notation, Scientific Notation and Significant Figures, Scientific Notation Practice Problems
Significant Figures	Step by Step Tutorial, Adding/Subtracting and Multiplying/Dividing with Significant Figures, Laboratory Application of Significant Figures, Significant Figure Rules	Crash Course: Unit Conversion and Significant Figures, How to Determine Significant Figures and Use 'Sig-Fig' Rules, Significant Figure Practice Problems
Stoichiometry	Khan Academy Stoichiometry Overview, Reaction Stoichiometry Tutorial, Chem Wiki Stoichiometric Coefficients and Practice Problems	Khan Academy Introduction, Crash Course Explanation, Bozeman Science Example Problems, Stoichiometry: Grams to Moles
Systematic Error vs. Random Error and Uncertainty in Measurement	Definitions, Specific Examples and Minimizations,Practice Problems with Solutions, Chem Wiki: Precision vs. Accuracy, Random Error vs. Systematic Error, Calculating Error, and Minimizing Error
Theoretical/Actual/Percent Yield	Definitions and Steps for Calculation, Explained Example Problems	Tutorial with Explained Steps, Theoretical, Actual, and Percent Yield Descriptions and Example Problem
Types of Reactions	Synthesis Reactions, Decomposition Reactions, Acid-Base Reactions, Oxidation and Reduction Reactions, Precipitation Reactions, Combustion Reactions, Single Displacement Reactions, Double Displacement Reactions	Overview of Synthesis, Combustion, Decomposition, Single Replacement and Double Replacement Reactions, Classifying Types of Chemical Reactions Practice Problems
Unit Conversion	Unit Conversion Using the Railroad Tracks Method, Basic Unit Conversion and Conversion Factors	Khan Academy: Unit Conversion within the Metric System, Converting Units with Conversion Factors Tutorial, Explained Practice Problems

Avogadro's Number Khan Academyy

Khan Academy Molar Mass

The Mole, Avogadro’s Number, and Counting by Mass (or Weight!) This video introduces counting by mass, the mole, and how it relates to atomic mass units (AMU) and Avogadro’s number. The Mole and Avogadro’s Number. Introduction to the idea of a mole as a number (vs. As a chemistry nerd, Mole Day is one of my favorite days. What’s a mole, you ask? It’s another name for Avogadro’s number, 6.022 × 10 23. And 10 23 is today’s date – 10/23 – see how we did that?!