Amaterial has a density of 8.9 g/cm^3. you have 3 grams of the substance. how much space does it take up?
a. 0.3cm3
b. 3.0 cm3
c. 5.9 cm3
d. 27 g/cm3

Density (d) is the ratio of the substance mass (m) to its volume (v). 
                                     d = m / v
Rearranging the equation gives us the equation for volume which is,
                                      v = m / d
Substituting the values,
                                        v = 3 g / (8.9 g/cm³) 
                                          v = 0.34 cm³
The substance occupies approximately 0.34 cm³.