Question

Relative density of a substance is defined as the ratio of the density of the substance to the density of water at________.

Answer 1

1. Relative density (RD) of a substance is defined as the ratio of the density of the substance to the density of water at $4^{°}C$.
2. $RD=\frac{densityofasubs\tan ce}{densityofwaterat{4}^{°}C}$

Hence, relative density of a substance is defined as the ratio of the density of the substance to the density of water at $4^{°}C$.