# Question #3aee6

##### 1 Answer
Mar 28, 2016

$\text{60.1 g}$

#### Explanation:

You can think about a substance's density as being a conversion factor between mass and volume.

More specifically, a substance's density will tell the mass of that substance that occupies one unit of volume.

In this case, 1,3-cycloheptadiene is said to have a density of ${\text{0.868 g mL}}^{- 1}$. The volume is expressed in milliliters, which means that one unit of volume would correspond to $\text{1 mL}$.

So, you know that every $\text{1 mL}$ of 1,3-cycloheptadiene has a mass of $\text{0.868 g}$, which means that $\text{69.2 mL}$ will have a mass of

$69.2 \textcolor{red}{\cancel{\textcolor{b l a c k}{\text{mL"))) * overbrace("0.868 g"/(1color(red)(cancel(color(black)("mL")))))^(color(purple)("density")) = color(green)(|bar(ul(color(white)(a/a)"60.1 g} \textcolor{w h i t e}{\frac{a}{a}} |}}} \to$ rounded to three sig figs.