Question

Define relative density. Relative density of mercury is 13.8 what is its density

Answer 1

Hey there,

Relative density or Specific gravity is the ratio of the density of sample and density of water in their same units.

Since it is the ratio of same units, it is unit less and dimensionless.

Specific gravity= Density of mercury/Density of water at 4°C

13.8=Density of mercury/ 1g per cc

Therefore density of mercury=13.8 g per cc

=13800 kg/m³ in SI unit

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Answer 2

Answer:

Relative density:

The relative density of a substance is the ratio of the density of that substance to the density of water at 4° C.

Relative density = Density of substance / Density of water at 4° C.

Relative density of a substance is also defined as the ratio of the mass of a certain volume of a substance to the mass of an unequal volume of water at 4° C.

Since relative density is a pure ratio, it has no unit.

It is a scalar quantity

The relative density of mercury is 13.6 and the density of mercury is 13600 in kgm³ and 13.6 in gcm³.