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

Conversion Factors (Simplified)

GOB Chemistry

1. Matter and Measurements

Conversion Factors (Simplified)

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3:58 minutes

Problem 54a

Textbook Question

At Sandra's clinic, the medications in a. to d. are used. Write the equality and two conversion factors, and identify the numbers as exact or give the number of significant figures for each:
a. The label on a bottle reads 10 mg of furosemide per 1 mL.

Verified step by step guidance

Step 1: Write the equality based on the information provided. The label states that there are 10 mg of furosemide per 1 mL. Therefore, the equality is:

10 mg = 1 mL

Step 2: Create the first conversion factor using the equality. The first conversion factor is:

\frac{10 mg}{1 mL}

. This means 10 mg of furosemide is equivalent to 1 mL.

Step 3: Create the second conversion factor by inverting the equality. The second conversion factor is:

\frac{1 mL}{10 mg}

. This means 1 mL contains 10 mg of furosemide.

Step 4: Identify the numbers in the equality and conversion factors as exact or approximate. The number '1' in 1 mL is exact because it is defined, while '10' in 10 mg has 2 significant figures because it is a measured quantity.

Step 5: Summarize the equality and conversion factors. The equality is

10 mg = 1 mL

, the first conversion factor is

\frac{10 mg}{1 mL}

, and the second conversion factor is

\frac{1 mL}{10 mg}

. The number '1' is exact, and '10' has 2 significant figures.

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Key Concepts

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

Unit Conversion

Unit conversion is the process of converting a quantity expressed in one set of units to another. In this context, it involves converting milligrams (mg) to milliliters (mL) using the information provided on the medication label. Understanding how to perform these conversions is essential for accurate dosing and medication administration.

Significant Figures

Significant figures are the digits in a number that contribute to its precision. This includes all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion. In the context of the question, identifying the significant figures in the measurements provided (10 mg and 1 mL) is crucial for ensuring that calculations maintain the appropriate level of precision.

Exact Numbers

Exact numbers are values that are counted or defined and have no uncertainty, such as the number of items in a dozen or defined conversion factors. In this case, the relationship between milligrams and milliliters as stated on the medication label can be considered an exact number, which is important for calculations as it does not limit the number of significant figures in the final result.

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Open Question

A patient has approximately 83 mL of blood pumping by their heart at each beat. By assuming they have a pulse of 75 beats per minute it is calculated that the patient pumps 8.964 x 10⁶ mL in one day. Identify the given amount and all conversion factors.

For 7 hours, an intravenous bag delivers medication to a patient at a rate of 2.75 drops a second with a mass of 42 mg per drop. Identify the given amount and all conversion factors.

The dispensing of prescription drugs are usually prescribed in units of mg per kg of body weight. A new prescription drug has a recommended dosage of 11 mg/kg. A 75 lb child requires three tablets each weighing 125 mg for their recommended dosage. Identify the given amount and all conversion factors.