Question

1. five ml of ethanol has a mass of 3.9 g, and 5.0 ml of benzene has a mass of 4.4 g. which liquid is denser?

Explanation:

Step1: Recall density formula

Density is calculated as $
ho = \frac{m}{V}$, where $m$ is mass and $V$ is volume.

Step2: Calculate density of ethanol

For ethanol, $m = 3.9\ g$ and $V = 5\ mL$. So density $
ho_{ethanol} = \frac{3.9\ g}{5\ mL} = 0.78\ g/mL$.

Step3: Calculate density of benzene

For benzene, $m = 4.4\ g$ and $V = 5.0\ mL$. So density $
ho_{benzene} = \frac{4.4\ g}{5.0\ mL} = 0.88\ g/mL$.

Step4: Compare densities

Compare $0.78\ g/mL$ (ethanol) and $0.88\ g/mL$ (benzene). Since $0.88 > 0.78$, benzene has a higher density.

Answer:

Benzene is denser.