# A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is it density?

Aug 18, 2016

$\textcolor{m a \ge n t a}{\text{2.70 g/mL}}$

#### Explanation:

To calculate the density, we have to use the formula below:

- Usually, density will have units of $\frac{g}{m L}$ when dealing with a liquid or units of $\frac{g}{c {m}^{3}}$ when dealing with a solid.

• The mass has units of grams, $g$.

• The volume will have units of $m L$ or $c {m}^{3}$

We are given the mass and the volume, both of which have good units, so all we have to do is plug the given values into the equation:

$D e n s i t y = \frac{40.5 g}{15.0 m L}$

Thus, the block of aluminum has a density of 2.70 g/mL.