# If a beaker of liquid has a density of 50 g/mL a volume of 5 mL, what is its mass?

Clearly, it's $250 \cdot g$.
$\text{Density} , \rho$ $=$ $\text{Mass"/"Volume}$
$\text{Mass}$ $=$ $\rho \times \text{volume}$ $=$ $50 \cdot g \cdot m {L}^{-} 1 \times 5 \cdot m L$.
This question is physically unrealistic, and should not have been asked. The densest liquid I know is mercury metal, $\rho = 13.55 \cdot g \cdot m {L}^{-} 1$. This question proposes a super dense liquid.