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

SI Units (Simplified)

GOB Chemistry

1. Matter and Measurements

SI Units (Simplified)

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0:49 minutes

Problem 7b

Textbook Question

On a typical day, Sandra may encounter several situations involving measurement. State the name and type of measurement indicated by the units in each of the following:
b. A premature baby weighs 1.9 kg.

Verified step by step guidance

Identify the unit given in the problem: The unit provided is 'kg', which stands for kilograms.

Determine the type of measurement associated with kilograms: Kilograms are a unit of mass in the metric system.

Understand the context of the measurement: The problem states that the weight of a premature baby is being measured, which refers to the baby's mass.

State the name of the measurement: The name of the measurement is 'mass'.

Conclude the type of measurement: The type of measurement is 'metric mass', and the unit used is kilograms (kg).

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Key Concepts

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

Mass Measurement

Mass measurement refers to the quantification of the amount of matter in an object, typically expressed in units such as kilograms (kg). In the context of the question, the weight of the premature baby is given as 1.9 kg, indicating the total mass of the baby. Understanding mass is crucial in fields like medicine and science, as it helps in assessing health and development.

Metric System

The metric system is an international decimalized system of measurement used widely around the world. It includes units such as meters for length, liters for volume, and kilograms for mass. The use of kilograms in the measurement of the baby's weight signifies adherence to the metric system, which is essential for standardization in scientific and medical contexts.

Weight vs. Mass

Weight and mass are often confused but represent different concepts. Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass. In this case, the measurement of 1.9 kg refers to the mass of the baby, but it is commonly understood as weight in everyday language. Recognizing this distinction is important in scientific discussions.

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Textbook Question

On a typical day, Sandra may encounter several situations involving measurement. State the name and type of measurement indicated by the units in each of the following:

c. An antacid tablet contains 1.0 g of calcium carbonate.

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On a typical day, Sandra may encounter several situations involving measurement. State the name and type of measurement indicated by the units in each of the following:

d. An infant has a temperature of 39.2 °C.

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Multiple Choice

Which of the following represents volume in SI units?

Convert 12 minutes into acceptable SI units.

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