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What units are appropriate for the density of gas as defined in class?

A. Kilograms per cubic meter
B. Pounds per square inch
C. Gallons per liter
D. Meters per second

Answer :

Final answer:

The correct answer is option (a) Kilograms per cubic meter, which is the SI unit for density. However, for practical laboratory measurement of gas density, grams per liter (g/L) is more commonly used.

Explanation:

The correct answer is option (a) Kilograms per cubic meter. The SI unit for density is kilograms per cubic meter (kg/m³), which is appropriate for all materials, including gases. In practical terms, especially in a laboratory setting, densities of gases are typically reported in grams per liter (g/L) due to their much lower density compared to solids and liquids.

The use of kilograms per cubic meter is scientifically accurate but may be inconvenient for common usage with gases, thus the grams per liter scale also becomes common. It's important for students to recognize that while kg/m³ is the standard SI unit, g/L is more commonly used in labs for gases due to its practicality in measurement.

The SI unit of density is kg/m³, which is the mass per unit volume. Gases, which have a low density compared to solids and liquids, are often reported in grams per liter (g/L). For example, the density of air is about 1.2 g/L.

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