Table of contents

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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

9. Solutions

Percent Concentrations

GOB Chemistry

9. Solutions

Percent Concentrations

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Multiple Choice

The pain reliever ibuprofen is sold as an oral suspension for children 2-11 years of age. How many milligrams would you obtain in a 2.7 tsp dose if it contains 100 mg per 5 mL? (1 tsp = 5 mL)

1.0×10² mg

67 mg

2.7×10² mg

54 mg

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Verified step by step guidance

First, understand the conversion factor given: 1 teaspoon (tsp) is equivalent to 5 milliliters (mL).

Next, convert the dose from teaspoons to milliliters. Since the dose is 2.7 tsp, multiply 2.7 by the conversion factor (5 mL/tsp) to find the volume in milliliters.

Now, use the concentration of ibuprofen provided: 100 mg per 5 mL. This means for every 5 mL of the suspension, there are 100 mg of ibuprofen.

Set up a proportion to find out how many milligrams of ibuprofen are in the volume you calculated in step 2. Use the ratio 100 mg/5 mL = x mg/volume in mL.

Solve the proportion for x to find the number of milligrams of ibuprofen in the 2.7 tsp dose.