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 sodium chloride (NaCl)?

Compound

Homogeneous mixture

Heterogeneous mixture

Element

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Verified step by step guidance

Understand the definitions of the terms: An element is a pure substance consisting of only one type of atom; a compound is a substance formed when two or more elements chemically combine in fixed proportions; a homogeneous mixture has a uniform composition throughout; a heterogeneous mixture has a non-uniform composition.

Identify the composition of sodium chloride (NaCl): It consists of sodium (Na) and chlorine (Cl) atoms chemically bonded together in a fixed ratio of 1:1.

Recognize that since NaCl is made of two different elements chemically combined, it cannot be an element or a mixture.

Recall that mixtures (both homogeneous and heterogeneous) involve physical combinations of substances without chemical bonding, which is not the case for NaCl.

Conclude that sodium chloride (NaCl) is best described as a compound because it is a pure chemical substance formed by the chemical combination of sodium and chlorine atoms.