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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 best describes aspirin in terms of the classification of matter?

Aspirin is an element because it is made up of only one type of atom.

Aspirin is a mixture because it contains different types of molecules.

Aspirin is a pure substance because it consists of a single type of molecule (C9H8O4).

Aspirin is a heterogeneous mixture because its composition varies throughout.

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Verified step by step guidance

Recall the basic classifications of matter: elements, compounds (pure substances), homogeneous mixtures, and heterogeneous mixtures.

Understand that an element consists of only one type of atom, such as oxygen (O2) or gold (Au).

Recognize that a compound (pure substance) consists of molecules made up of two or more different atoms chemically bonded in a fixed ratio, such as water (H2O) or aspirin (C9H8O4).

Identify that mixtures contain two or more substances physically combined, which can be homogeneous (uniform composition) or heterogeneous (non-uniform composition).

Since aspirin is composed of molecules with the formula C9H8O4, it is a pure substance (a compound) because it contains only one type of molecule, not a mixture or element.