# What is the density of a substance that has a mass of 112 g and a volume of 53 mL?

##### 2 Answers

#### Explanation:

By definition,

Here, we are given the mass and the volume with respective units of

Would this substance float? Why or why not?

#### Explanation:

**Density** is simply a measure of the mass of exactly **one unit of volume** of a given substance.

In this case, your sample is said to occupy a volume of

You already know that

#overbrace((color(blue)(?)color(white)(.)"g")/"1 mL")^(color(red)("the density of the substance")) = overbrace("112 g"/"53 mL")^(color(red)("its known composition"))#

Rearrange and solve to find

#color(blue)(?) = (1 color(red)(cancel(color(black)("mL"))))/(53color(red)(cancel(color(black)("mL")))) * "112 g"#

#color(blue)(?) ="2.1 g"#

So, if

#color(darkgreen)(ul(color(black)("density = 2.1 g mL"^(-1))))#

The answer is rounded to two **sig figs**, the number of sig figs you have for the volume of the sample.