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

Significant Figures: In Calculations

GOB Chemistry

1. Matter and Measurements

Significant Figures: In Calculations

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Multiple Choice

Perform the following mathematical operations and express the result to the correct number of significant figures.
(6.404 × 2.91) / (18.7 – 17.1)

11.65

11.7

11.625

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Verified step by step guidance

Step 1: Begin by performing the multiplication operation in the numerator: Multiply 6.404 by 2.91. When multiplying, the number of significant figures in the result should be the same as the number with the fewest significant figures in the operation.

Step 2: Next, perform the subtraction operation in the denominator: Subtract 17.1 from 18.7. When subtracting, the number of decimal places in the result should be the same as the number with the fewest decimal places in the operation.

Step 3: Divide the result from Step 1 by the result from Step 2. The number of significant figures in the final result should be determined by the number with the fewest significant figures from the previous operations.

Step 4: Review the significant figures in each part of the calculation to ensure the final result is expressed with the correct number of significant figures.

Step 5: Compare the calculated result with the provided options to determine which one matches the correct number of significant figures.