# Question #33f42

##### 1 Answer

The substance that has the higher density.

#### Explanation:

The **density** of a substance tells you the mass of exactly *one unit of volume* of said substance.

This implies that a substance with a **higher density** will have **more mass** concentrated in *one unit of volume* than a substance with a **lower density**.

In this case, water is said to have a density of *one unit of volume* of water, i.e. in

Gasoline is said to have a density of *one unit of volume* of gasoline, i.e.

Consequently, you can say that because one unit of volume of water has a greater mass than one unit of volume of gasoline, **any volume** of water will have a greater mass than **the same volume** of gasoline.

In other words, when dealing with equal volumes of water and of gasoline, the sample of water will **always** have the greater mass.

So if

#color(blue)(ul(color(black)("1 L" = 10^3"mL")))#

you can say that

#1 color(red)(cancel(color(black)("L water"))) * (10^3color(red)(cancel(color(black)("mL"))))/(1color(red)(cancel(color(black)("L")))) * "1.00 g"/(1color(red)(cancel(color(black)("mL water")))) = "1000 g"#

and

#1 color(red)(cancel(color(black)("L gasoline"))) * (10^3color(red)(cancel(color(black)("mL"))))/(1color(red)(cancel(color(black)("L")))) * "0.68 g"/(1color(red)(cancel(color(black)("mL gasoline")))) = "680 g"#

As you can see, the sample of water has a greater mass than the sample of gasoline.