Question

find the mass of a block with a volume of 30 cm³ and a density of 2.1 g/cm³.

Explanation:

Step1: Recall density - mass - volume formula

The formula for density $
ho$ is $
ho=\frac{m}{V}$, where $m$ is mass and $V$ is volume. We want to find $m$, and we can re - arrange the formula to $m =
ho\times V$.

Step2: Substitute given values

Given $
ho = 2.1\ g/cm^{3}$ and $V=30\ cm^{3}$. Substitute these values into the formula $m=
ho\times V$. So $m = 2.1\ g/cm^{3}\times30\ cm^{3}$.

Step3: Calculate the mass

$m=2.1\times30\ g = 63\ g$.

Answer:

$63\ g$