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

Scientific Notation

GOB Chemistry

1. Matter and Measurements

Scientific Notation

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1:34 minutes

Problem 56b

Textbook Question

Write each of the following in scientific notation:
b. 1440

Verified step by step guidance

Identify the significant digits in the number 1440. These are the non-zero digits, which are 1, 4, 4, and 0.

Determine where the decimal point would be placed to express the number in scientific notation. In this case, the decimal point should be placed after the first significant digit, making it 1.440.

Count the number of places the decimal point was moved to reach its new position. For 1440, the decimal point was moved 3 places to the left.

Express the number in the form \( a \times 10^n \), where \( a \) is the number with the decimal point placed after the first significant digit (1.440), and \( n \) is the number of places the decimal point was moved (3).

Write the final expression as \( 1.440 \times 10^3 \), which is the scientific notation for 1440.

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Key Concepts

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

Scientific Notation

Scientific notation is a method of expressing numbers that are too large or too small in a compact form. It is written as the product of a number between 1 and 10 and a power of ten. For example, the number 1440 can be expressed as 1.44 x 10^3, where 1.44 is the coefficient and 10^3 indicates that the decimal point in 1.44 is moved three places to the right.

Significant Figures

Significant figures are the digits in a number that contribute to its precision. In scientific notation, the coefficient should be expressed with the appropriate number of significant figures based on the original number. For 1440, if it is known to have three significant figures, it should be written as 1.44 x 10^3, ensuring that the precision of the original number is maintained.

Powers of Ten

Powers of ten are used in scientific notation to indicate the scale of the number. Each power of ten represents a factor of ten multiplied by itself a certain number of times. In the case of 1440, the exponent in 10^3 shows that the number is scaled up by three factors of ten, which helps in quickly understanding the magnitude of the number.