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

Metric Prefixes

GOB Chemistry

1. Matter and Measurements

Metric Prefixes

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1:14 minutes

Problem 60a

Textbook Question

Use metric conversion factors to solve each of the following problems:
a. The Daily Value (DV) for phosphorus is 800 mg. How many grams of phosphorus are recommended?

Verified step by step guidance

Step 1: Understand the problem. The goal is to convert the given amount of phosphorus from milligrams (mg) to grams (g) using metric conversion factors.

Step 2: Recall the metric conversion factor between milligrams and grams. 1 gram (g) is equal to 1000 milligrams (mg). This can be expressed as:

\frac{1}{1000}

g/mg.

Step 3: Set up the conversion. Multiply the given value (800 mg) by the conversion factor to cancel out the milligrams and convert to grams. The setup will look like:

800 \times \frac{1}{1000}

Step 4: Perform the multiplication and division. This involves dividing 800 by 1000 to find the equivalent value in grams.

Step 5: Write the final result in grams. Ensure the answer is expressed with the correct number of significant figures based on the given data (800 mg has 3 significant figures).

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Key Concepts

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

Metric Conversion

Metric conversion involves changing a measurement from one unit to another within the metric system. In this case, converting milligrams (mg) to grams (g) is necessary, where 1 gram equals 1,000 milligrams. Understanding this conversion is essential for accurately interpreting nutritional values and recommendations.

Daily Value (DV)

The Daily Value (DV) is a reference value used on food labels to indicate how much a nutrient contributes to a daily diet, based on a standard 2,000-calorie intake. For phosphorus, the DV is set at 800 mg, which helps consumers understand the nutrient's importance and how much they should aim to consume daily.

Nutritional Recommendations

Nutritional recommendations provide guidelines for the intake of essential nutrients to maintain health and prevent deficiencies. These recommendations, such as the DV for phosphorus, are based on scientific research and are designed to help individuals make informed dietary choices to support overall well-being.