Answer
$1500\ mL $
$1500\ cm^3$
$1.5\ dm^3$
Work Step by Step
We use stoichiometry, making sure that all units cancel out to $mL, cm^3, \text{and} \space dm^3$, respectively, to obtain:
$1.5\ L\times
\begin{cases}
1000\ mL/L=1500\ mL \\
1000\ cm^3/L = 1500\ cm^3 \\
1\ dm^3/L = 1.5\ dm^3
\end{cases}$
