# The density lead is 11.3 g/mL. What is the mass of 45 mL of the of metal?

##### 1 Answer

#### Explanation:

For a sample of a substance, the relationship between the **mass** of the sample and the **volume** it occupies is given by the **density** of the substance.

The *density* of a substance tells you the mass of **exactly one unit of volume**. In your case, the density of lead is given in

A density of **every** unit of volume, i.e. every milliliter, of lead has a mass of

You know that your sample occupies

#45 color(red)(cancel(color(black)("mL"))) * color(white)(overbrace(color(black)("11.3 g"/(1color(red)(cancel(color(black)("mL"))))))^(color(blue)("the density of lead"))) = color(green)(|bar(ul(color(white)(a/a)color(black)("510 g")color(white)(a/a)|)))#

The answer is rounded to two **sig figs**.