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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2:04 minutes

Problem 8b

Textbook Question

Indicate whether each of the following describes a gas, a liquid, or a solid:
b. The particles in a tank of oxygen are very far apart.

Verified step by step guidance

Step 1: Understand the three states of matter: solids, liquids, and gases. Solids have particles that are tightly packed in a fixed arrangement, liquids have particles that are close together but can move past one another, and gases have particles that are very far apart and move freely.

Step 2: Analyze the description provided in the problem. It states that the particles in the tank of oxygen are 'very far apart.'

Step 3: Recall that particles being 'very far apart' is a characteristic of the gas state, as gases have no fixed shape or volume and their particles are widely spaced.

Step 4: Conclude that the description matches the properties of a gas, as the particles in a gas are far apart and move independently.

Step 5: Verify your understanding by comparing this description to the properties of solids and liquids, which do not match the given scenario.

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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. Each state is characterized by the arrangement and behavior of its particles. In solids, particles are closely packed and vibrate in place; in liquids, they are close but can move past one another; in gases, particles are far apart and move freely.

Particle Arrangement

The arrangement of particles in a substance determines its state. In gases, particles are widely spaced, allowing them to fill the container they occupy. This contrasts with liquids, where particles are closer together but still mobile, and solids, where particles are tightly packed and fixed in position.

Kinetic Molecular Theory

The Kinetic Molecular Theory explains the behavior of particles in different states of matter. It posits that gas particles are in constant, random motion and that their energy increases with temperature. This theory helps to understand why gases have low density and can expand to fill their containers, as seen in the example of oxygen in a tank.

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Identify each of the following changes of state as melting, freezing, sublimation, or deposition:

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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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