Answer
$0.522 \frac{g}{cm^{3}}$
Work Step by Step
$8cm\times 6cm \times 2cm=96cm^{3}$.
and
$53 g$
We need the answer in $\frac{g}{cm^{3}}$
$\therefore \frac{53g}{96cm^{3}}=\frac{53}{96}\frac{g}{cm^{3}}$
$\approx 0.522\frac{g}{cm^{3}}$.