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 is true of open systems in the context of the Law of Conservation of Mass?

Mass is conserved within the system regardless of exchanges with the surroundings.

Mass is always conserved in open systems without any external influence.

Mass can change within the system due to exchanges with the surroundings.

Open systems do not allow any exchange of matter with the surroundings.

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Verified step by step guidance

Understand the concept of an open system: In chemistry, an open system is one where both energy and matter can be exchanged with the surroundings.

Review the Law of Conservation of Mass: This law states that mass is neither created nor destroyed in a closed system. However, in an open system, mass can be transferred in or out.

Analyze the options given: The first option suggests mass is conserved regardless of exchanges, which contradicts the definition of an open system. The second option implies mass is always conserved without external influence, which is not true for open systems.

Consider the correct statement: The correct answer is that mass can change within the system due to exchanges with the surroundings, aligning with the definition of an open system.

Conclude by understanding that open systems allow for the exchange of matter, which can lead to changes in mass within the system, unlike closed systems where mass remains constant.