# The density of mercury metal is 13.6 g/mL. What is the mass 45 mL of the metal?

Feb 3, 2016

612gm

#### Explanation:

the mass of $1 m l$ is $13.6 g m$
$\therefore$the mass of $45 m l$ is=$\left(13.6 \times 45\right)$gm
$= 612 g m$

Feb 3, 2016

Density, $\rho$ $=$ $\left(\text{Mass")/("Per unit volume}\right)$. For chemists, usually the units are given as $g \cdot m {L}^{-} 1$
So, given that $\rho$ $=$ $\frac{g}{m L}$; all we have to do is multiply the density by the volume to give the mass (i.e. $g$ $=$ rhoxxmL):
$\text{Mass}$ $=$ $\rho \times \text{Volume}$ $=$ $13.6 \cdot g \cancel{m {L}^{-} 1}$$\times 45$ $\cancel{m L}$ $=$ ??g