Domanda del libro di testo
Use metric conversion factors to solve each of the following problems:
b. A cooler has a volume of 5000 mL. What is the capacity of the cooler in liters?
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Ch.2 Chemistry and Measurements
Timberlake14th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9781292472249
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TOC.tableOfContents
- Ch.1 Chemistry in Our Lives19
- Ch.2 Chemistry and Measurements80
- Ch.3 Matter and Energy53
- Ch.4 Atoms and Elements58
- Ch.5 Nuclear Chemistry42
- Ch.6 Ionic and Molecular Compounds57
- Ch.7 Chemical Quantities and Reactions38
- Ch.8 Gases30
- Ch.9 Solutions50
- Ch.10 Acids and Bases and Equilibrium64
- Ch.11 Introduction to Organic Chemistry: Hydrocarbons77
- Ch.12 Alcohols, Thiols, Ethers, Aldehydes, and Ketones82
- Ch.13 Carbohydrates54
- Ch.14 Carboxylic Acids, Esters, Amines, and Amides91
- Ch.15 Lipids61
- Ch.16 Amino Acids, Proteins, and Enzymes84
- Ch.17 Nucleic Acids and Protein Synthesis86
- Ch.18 Metabolic Pathways and ATP Production73
Timberlake14th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9781292472249Non è quello che usi tu?Cambia libro di testo
Capitolo 2, Problema 54b
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:
b. The Daily Value (DV) for selenium is 70. mcg.
Guida verificata passo dopo passo1
Step 1: Write the equality based on the given information. The Daily Value (DV) for selenium is 70 mcg, which can be expressed as an equality: .
Step 2: Create the first conversion factor using the equality. For example, .
Step 3: Create the second conversion factor by inverting the first conversion factor. For example, .
Step 4: Identify whether the number 70 is exact or has significant figures. Since the DV is a defined value, the number 70 is considered exact.
Step 5: Review the equality and conversion factors to ensure they are correctly formatted and can be used in calculations involving selenium dosage or DV comparisons.
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Daily Value (DV)
The Daily Value (DV) is a reference value used on food labels to indicate how much a nutrient in a serving of food contributes to a daily diet. It helps consumers understand the nutritional content of food in the context of a total daily intake. For selenium, the DV is set at 70 micrograms (mcg), which serves as a guideline for adequate intake.
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Percorso guidato
01:24
Kw and Temperature
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. Understanding significant figures is crucial for accurately reporting measurements and calculations, especially in scientific contexts where precision is vital.
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Percorso guidato
01:09Significant Figures (Simplified) Example 2
Conversion Factors
Conversion factors are ratios used to convert a quantity expressed in one unit to another unit. They are essential in calculations involving different measurement systems, ensuring that the values remain equivalent. For example, to convert micrograms to milligrams, one would use the conversion factor of 1 mg = 1000 mcg.
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Percorso guidato
03:45Conversion Factors (Simplified) Example 2
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