# A student weighed an empty graduated cylinder and found that it had a mass of 25.23 g. When filled with 25.0 mL of an unknown liquid, the total mass was 50.92 g. What is the density of the liquid?

$\rho \text{ (density)}$ $=$ $\text{Mass"/"Volume}$ $\cong$ $1 \cdot g \cdot m {L}^{-} 1$
For your problem, $\rho = \frac{\left(50.92 - 25.23\right) \cdot g}{25.0 \cdot m L}$ $=$ $1.03 \cdot g \cdot m {L}^{-} 1$
Alternatively $\rho = \frac{\left(50.92 - 25.23\right) \cdot g}{25.0 \times {10}^{-} 3 L}$ $=$ ??g*L^-1