Question

define the relative density of a substance. Why does relative density have no unit?

Answer 1

Answer:

Relative density has no unit because it is the ratio of same units which gets cancelled. Answer: ... Relative density = Density of the substance/Density of water at 4°C. As both the numerator and the denominator on the RHS of the above formula has the same unit (i.e. kg/m3) they get cancelled.

Explanation:

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Answer 2

Answer:

Relative density is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material (i.e., water). It is usually measured at room temperature (20 Celcius degrees) and standard atmosphere (101.325kPa). It is unitless.Relative density has no unit because it is the ratio of same units which gets cancelled. Relative density = Density of the substance/Density of water at 4°C.