Question

What is meant by density and relative density of a substance

Answer 1

Answer:

Density is defined as amount of mass per unit volume of a substance. Relative density is the ratio of density of a substance to the density of water.

Explanation:

When we take a substance which could be solid, liquid or a gas and take 1 cm cube volume out of it, that is, unit volume is taken out of it. The mass of unit volume is the density of that particular substance. Relative density is just the ratio of density of the substance to that of water.

Answer 2

The density, of a substance is its mass per unit volume. The symbol most often used for density is ρ, although the Latin letter D can also be used. Mathematically, density is defined as mass divided by volume: ${\displaystyle \rho ={\frac {m}{V}}}$ where ρ is the density, m is the mass, and V is the volume.

Relative density, or specific gravity, is the ratio of the density of a substance to the density of a given reference material. Specific gravity for liquids is nearly always measured with respect to water at its densest; for gases, the reference is air at room temperature.

The SI unit for density is: kilogram per cubic metre (kg/m³).

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