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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1:32 minutes

Problem 7a

Textbook Question

On a typical day, medical personnel may encounter several situations involving measurement. State the name and type of measurement indicated by the units in each of the following:
a. The clotting time for a blood sample is 12 s.

Verified step by step guidance

Identify the unit provided in the problem. In this case, the unit is 's', which stands for seconds.

Determine what the unit 'seconds' measures. Seconds are a unit of time in the International System of Units (SI).

Understand the context of the problem. The clotting time refers to the duration it takes for a blood sample to clot, which is a time-based measurement.

State the name of the measurement. The name of the measurement is 'clotting time'.

Classify the type of measurement. Since the unit is seconds, the type of measurement is 'time'.

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Key Concepts

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

Clotting Time

Clotting time refers to the duration it takes for blood to form a clot after a sample is taken. This measurement is crucial in assessing the blood's ability to coagulate, which is vital for diagnosing bleeding disorders or monitoring anticoagulant therapy.

Measurement Units

The unit 'seconds' (s) is a standard unit of time in the International System of Units (SI). In the context of clotting time, it quantifies the duration required for the clotting process to occur, providing a clear and objective measure for medical evaluation.

Types of Measurement

Measurements can be classified into various types, such as qualitative and quantitative. Clotting time is a quantitative measurement, as it provides a numerical value that can be used for comparison and analysis, essential for clinical decision-making.

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Multiple Choice

Which of the following represents volume in SI units?

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