Question

A rock has a density of 2.2 g/cm3 and a volume of 66.5 mL. How much mass does the rock have?

Answer 1

Given parameters:

Density of the rock = 2.2g/cm³

Volume of rock = 66.5mL

Unknown:

Mass of the rock = ?

Solution:

Density is the mass per unit volume of a body. It is mathematically expressed as shown below;

Density =
`(mass)/(volume)`

So;

Mass = Density x Volume

We need to take the given parameters to the same unit before we solve;

convert mL to cm³

1mL = 1cm³; 66.5mL is the same as 66.5cm³

Now solve;

Mass = 2.2 x 66.5 = 146.3g

The mass of the rock is 146.3g