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

Classification of Matter

GOB Chemistry

1. Matter and Measurements

Classification of Matter

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0:35 minutes

Problem 72b

Textbook Question

Classify each of the following as an element, a compound, or a mixture:
b. a salad dressing of oil and vinegar

Name: Classification of Matter
Uploaded: 2022-07-23T00:00:00.000Z
Duration: 35 s
Description: Watch the video explanation for the concept: Classification of Matter

Verified step by step guidance

Step 1: Understand the definitions of the terms 'element,' 'compound,' and 'mixture.' An element is a pure substance made of only one type of atom. A compound is a pure substance composed of two or more elements chemically combined in a fixed ratio. A mixture is a combination of two or more substances that are physically combined and can be separated by physical means.

Step 2: Analyze the given substance, which is a salad dressing made of oil and vinegar. Note that oil and vinegar are two distinct substances.

Step 3: Determine if the components (oil and vinegar) are chemically combined or physically combined. In this case, oil and vinegar are physically combined, as they do not chemically react with each other.

Step 4: Consider whether the mixture is homogeneous or heterogeneous. Since oil and vinegar do not mix uniformly and form separate layers, this is a heterogeneous mixture.

Step 5: Conclude that the salad dressing of oil and vinegar is classified as a mixture, specifically a heterogeneous mixture, because it consists of two physically combined substances that are not uniformly distributed.

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Key Concepts

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

Element

An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom and is represented on the periodic table. Examples include hydrogen, oxygen, and gold. Elements are the fundamental building blocks of matter.

Compound

A compound is a substance formed when two or more elements chemically bond together in fixed proportions. Compounds have unique properties that differ from the individual elements that compose them. Water (H2O) and carbon dioxide (CO2) are common examples of compounds, showcasing how elements combine to create new substances.

Mixture

A mixture is a combination of two or more substances that retain their individual properties and can be separated by physical means. Mixtures can be homogeneous (uniform composition) or heterogeneous (distinct components). The salad dressing of oil and vinegar is a heterogeneous mixture, as the oil and vinegar do not chemically combine and can be visually distinguished.

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