Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

1. Matter and Measurements

States of Matter

GOB Chemistry

1. Matter and Measurements

States of Matter

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1:32 minutes

Problem 8c

Textbook Question

Indicate whether each of the following describes a gas, a liquid, or a solid:
c. Helium occupies the entire volume of a balloon.

Verified step by step guidance

Step 1: Understand the properties of gases, liquids, and solids. Gases have no fixed shape or volume and expand to fill the container they are in. Liquids have a fixed volume but take the shape of their container. Solids have both a fixed shape and volume.

Step 2: Analyze the behavior of helium in the given scenario. The problem states that helium occupies the entire volume of a balloon.

Step 3: Relate this behavior to the properties of gases. A substance that expands to fill the entire volume of its container (in this case, the balloon) is characteristic of a gas.

Step 4: Conclude that helium in this scenario is behaving as a gas because it conforms to the property of gases by occupying the entire volume of the balloon.

Step 5: Verify your understanding by comparing this behavior to the properties of liquids and solids, which do not expand to fill the entire volume of their container.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

States of Matter

Matter exists in three primary states: solid, liquid, and gas. Solids have a fixed shape and volume, liquids have a fixed volume but take the shape of their container, and gases neither have a fixed shape nor a fixed volume, expanding to fill their container completely.

Properties of Gases

Gases are characterized by their ability to expand and fill the volume of their container. This is due to the high kinetic energy of gas molecules, which allows them to move freely and spread out, resulting in low density and compressibility compared to solids and liquids.

Kinetic Molecular Theory

The Kinetic Molecular Theory explains the behavior of gases based on the motion of their particles. It posits that gas particles are in constant, random motion and that the temperature of a gas is directly related to the average kinetic energy of its particles, influencing how gases occupy space.

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Multiple Choice

Which of the following choices will have the lowest observed viscosity?

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Textbook Question

Indicate whether each of the following describes a gas, a liquid, or a solid:

a. Lemonade has a definite volume but takes the shape of its container

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