Table of contents

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 best describes a main difference between a mixture and a pure substance?

A mixture can only be separated by chemical means, while a pure substance can be separated by physical means.

A mixture contains two or more substances physically combined, while a pure substance has a fixed composition and distinct properties.

Mixtures have a constant composition throughout, while pure substances do not.

A pure substance always contains more than one type of atom, while a mixture contains only one type of atom.

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Verified step by step guidance

Understand the definitions: A pure substance is a form of matter that has a fixed composition and distinct chemical properties, meaning it consists of only one type of particle (element or compound).

Recognize that a mixture consists of two or more substances physically combined, which means the components retain their individual properties and can vary in proportion.

Note that mixtures can be separated by physical means (such as filtration, distillation, or evaporation) because the substances are not chemically bonded.

Recall that pure substances require chemical methods to be broken down into simpler substances if they are compounds, because their components are chemically bonded.

Compare the options given and identify that the key difference is that mixtures are physically combined substances with variable composition, while pure substances have a fixed composition and distinct properties.