Table of contents

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1. Intro to General Chemistry3h 48m
2. Atoms & Elements4h 16m
3. Chemical Reactions4h 10m
4. BONUS: Lab Techniques and Procedures1h 38m
5. BONUS: Mathematical Operations and Functions48m
6. Chemical Quantities & Aqueous Reactions3h 53m
7. Gases3h 49m
8. Thermochemistry2h 37m
9. Quantum Mechanics2h 58m
10. Periodic Properties of the Elements3h 9m
11. Bonding & Molecular Structure3h 29m
12. Molecular Shapes & Valence Bond Theory1h 57m
13. Liquids, Solids & Intermolecular Forces2h 23m
14. Solutions3h 1m
15. Chemical Kinetics2h 53m
16. Chemical Equilibrium2h 29m
17. Acid and Base Equilibrium5h 1m
18. Aqueous Equilibrium4h 47m
19. Chemical Thermodynamics1h 50m
20. Electrochemistry2h 42m
21. Nuclear Chemistry2h 36m
22. Organic Chemistry5h 7m
23. Chemistry of the Nonmetals2h 39m
24. Transition Metals and Coordination Compounds3h 16m

1. Intro to General Chemistry

Classification of Matter

General Chemistry

1. Intro to General Chemistry

Classification of Matter

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Multiple Choice

Which of the following is NOT a pure substance?

Sodium chloride (NaCl)

Gold (Au)

Air

Oxygen gas (O_2)

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Understand the definition of a pure substance: a pure substance has a fixed composition and distinct chemical properties. It can be either an element or a compound.

Identify each option: Sodium chloride (NaCl) is a compound with a fixed ratio of sodium and chlorine atoms, so it is a pure substance.

Gold (Au) is an element consisting of only one type of atom, making it a pure substance.

Oxygen gas (O_2) is a molecule made of two oxygen atoms, so it is a pure substance as well.

Air is a mixture of different gases (mainly nitrogen, oxygen, carbon dioxide, and others) and does not have a fixed composition, so it is NOT a pure substance.