Which term describes the density comparison to water?

Which term describes the density comparison to water?

• A. Molar mass
• B. Viscosity
• C. Density relative to air
• D. Relative density

Answer: (D)

Relative density is the term that describes how dense a substance is compared with water. It’s the ratio of the substance’s density to the density of water (usually at 4°C), so it’s a unitless number that directly tells you buoyancy behavior. If the relative density is less than 1, the material will float on water; if it’s greater than 1, it will sink. This makes it especially useful in hazmat work for predicting how a liquid will behave in spills, during containment, and in environmental scenarios. Molar mass is about how much matter is in a specific amount of substance, not how heavy it is relative to water. Viscosity measures how easily a substance flows, not its density. A density relative to air isn’t the standard way to compare density to water, whereas relative density (specific gravity to water) is the established term for that purpose.

Relative density is the term that describes how dense a substance is compared with water. It’s the ratio of the substance’s density to the density of water (usually at 4°C), so it’s a unitless number that directly tells you buoyancy behavior. If the relative density is less than 1, the material will float on water; if it’s greater than 1, it will sink. This makes it especially useful in hazmat work for predicting how a liquid will behave in spills, during containment, and in environmental scenarios.

Molar mass is about how much matter is in a specific amount of substance, not how heavy it is relative to water. Viscosity measures how easily a substance flows, not its density. A density relative to air isn’t the standard way to compare density to water, whereas relative density (specific gravity to water) is the established term for that purpose.