# A rock weighing 32.0 g is placed in in a graduated cylinder displacing the volume from 12.3 mL to 16.8 mL. What is the density of the rock in grams/cubic centimeter?

$\text{Density, "rho="Mass"/"Volume} \cong 7 \cdot g \cdot m {L}^{-} 1$
$\rho$ $=$ $\frac{32.0 \cdot g}{\left(16.8 - 12.3\right) \cdot m L}$
Note that $1 \cdot m L = 1 \cdot c {m}^{-} 3$.