Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

2. Cell Chemistry & Cell Components

Atoms- Smallest Unit of Matter

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Atoms- Smallest Unit of Matter

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Problem 2

Textbook Question

We can be sure that a mole of table sugar and a mole of vitamin C are equal in theira. mass.b. volume.c. number of atoms.d. number of molecules.

Verified step by step guidance

Identify the concept of a mole in chemistry, which is a unit that measures the amount of substance.

Understand that one mole of any substance contains Avogadro's number of entities, which is approximately \(6.022 \times 10^{23}\).

Recognize that these entities can be atoms, molecules, ions, etc., depending on the substance.

Consider that a mole of table sugar and a mole of vitamin C both contain the same number of molecules, as they are both measured in moles.

Conclude that the correct answer is related to the number of molecules, as a mole is defined by the number of entities, not by mass or volume.

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Key Concepts

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

Mole Concept

The mole is a fundamental unit in chemistry that quantifies the amount of substance. One mole contains approximately 6.022 x 10^23 entities, which can be atoms, molecules, or ions. This concept allows chemists to relate mass and number of particles in a substance, making it essential for stoichiometric calculations.

Molecular Composition

Molecular composition refers to the types and numbers of atoms that make up a molecule. For example, table sugar (sucrose) has a different molecular formula than vitamin C (ascorbic acid), leading to different properties. Understanding molecular composition is crucial for comparing substances at the molecular level.

Avogadro's Law

Avogadro's Law states that equal volumes of gases, at the same temperature and pressure, contain an equal number of molecules. This principle extends to all substances, indicating that one mole of any substance contains the same number of molecules, regardless of the substance's mass or volume. This is key to understanding why a mole of sugar and a mole of vitamin C are equal in the number of molecules.