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

Dimensional Analysis

GOB Chemistry

1. Matter and Measurements

Dimensional Analysis

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1:48 minutes

Problem 61d

Textbook Question

Solve each of the following problems using one or more conversion factors:
d. A plant fertilizer contains 15% nitrogen (N) by mass. In a container of soluble plant food, there are 10.0 oz of fertilizer. How many grams of nitrogen are in the container?

Verified step by step guidance

Step 1: Identify the given information. The fertilizer contains 15% nitrogen by mass, and the container has 10.0 oz of fertilizer. We need to calculate the mass of nitrogen in grams.

Step 2: Convert the mass of fertilizer from ounces to grams. Use the conversion factor: 1 oz = 28.3495 g. Multiply 10.0 oz by 28.3495 g/oz to find the mass of fertilizer in grams.

Step 3: Calculate the mass of nitrogen in the fertilizer. Since the fertilizer contains 15% nitrogen by mass, multiply the total mass of fertilizer (in grams) by 0.15 (representing 15%).

Step 4: Ensure the units are consistent throughout the calculation. The final result will be in grams of nitrogen.

Step 5: Double-check the calculation setup to confirm that the conversion factors and percentage are applied correctly.

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Key Concepts

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

Mass Percentage

Mass percentage is a way of expressing the concentration of a component in a mixture. It is calculated by dividing the mass of the component by the total mass of the mixture and multiplying by 100. In this case, the fertilizer contains 15% nitrogen by mass, meaning that 15 grams of nitrogen are present in every 100 grams of fertilizer.

Unit Conversion

Unit conversion is the process of converting a quantity expressed in one set of units to another. In this problem, we need to convert ounces to grams to find the mass of nitrogen. Knowing that 1 ounce is approximately 28.35 grams allows us to perform this conversion accurately, ensuring that all measurements are in compatible units for calculation.

Calculating Mass of a Component

To find the mass of a specific component in a mixture, you multiply the total mass of the mixture by the mass percentage of that component. In this scenario, after converting the mass of fertilizer from ounces to grams, we can calculate the mass of nitrogen by applying the formula: mass of nitrogen = total mass of fertilizer × (mass percentage of nitrogen / 100). This step is crucial for determining the exact amount of nitrogen present.

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Related Practice

Textbook Question

Using conversion factors, solve each of the following problems:

a. Sandra has an order from the doctor to give 1.0 g of tetracycline every six hours to a patient. If the stock on hand is 500-mg tablets, how many will she need for one day’s treatment?

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Multiple Choice

If the distance between Washington, D.C. and New York City is 224.9 miles, determine the distance in centimeters.

The average human body is composed of approximately 160 fluid ounces of blood. How many quarts of blood does the average human body possess? (1 gallon = 4 quarts, 1 pint = 2 cups, 1 cup = 8 fluid ounces, 1 quart = 2 pints).

Lipitor, a pharmaceutical drug that has been shown to lower 'bad' cholesterol levels, while boosting 'good' cholesterol levels had over $12 billion in sales last year. Each pill weighs 2.5 g, which contains 4.0% of the active ingredient by mass. What mass in kg of the active ingredient is present in one bottle of 120 pills?

Solve each of the following problems using one or more conversion factors:

c. An athlete has 15% body fat by mass. What is the weight of fat, in pounds, of a 74-kg athlete?

1414

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Textbook Question

Solve each of the following problems using one or more conversion factors:

a. A container holds 0.500 qt of liquid. How many milliliters of lemonade will it hold?

1458