A piece of brass of volume $30~cm^3$ has a mass of $252~g.$ Fin the density of brass in $gcm^{-3}$.

Given,

Volume of brass, $V= 30~cm^3$

And mass of brass, $m = 252~g$

Density in $gcm^{-3}$,

Using formula of density

$Density (\rho) = \dfrac{mass(m)}{Volume (V)}$

$Density (\rho) = \dfrac{252~g}{30~cm^3}= 8.4~gcm^{-3}$