# Question #d64a6

##### 1 Answer

#### Explanation:

The idea here is that you can determine the **volume** of the object by looking at the difference between the water levels.

When you add the object to the water, a volume of water that is **equal** to the volume of the object will be displaced

In your case, the volume of the water displaced by the object will be equal to

#"29.4 mL " - " 25.1 mL = 4.3 mL"#

This means that the volume of the object is equal to

Now, in order to find its **density**, you must figure out the mass of exactly **unit of volume**, i.e. of

Since you know that

#1 color(red)(cancel(color(black)("mL"))) * "5.1 g"/(4.3 color(red)(cancel(color(black)("mL")))) = "1.186 g"#

This means that the **density** of the object, i.e. its mass per unit of volume, will be equal to

#color(darkgreen)(ul(color(black)("density = 1.2 g mL"^(-1))))#

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