# A cube of ruthenium metal 1.5 cm on a side has a mass of 42.0 g. What is the density in g/cm^3?

$\text{Density}$ $=$ $\text{Mass"/"Volume}$ $=$ ??
$\rho , \text{density}$ $=$ $\text{Mass"/"Volume}$ $=$ $\frac{42 \cdot g}{1.50 \cdot c m} ^ 3$ $\cong$ $12 \cdot g \cdot c {m}^{-} 3$.