Acube of osmium metal 1.500 cm on a side has a mass of 76.31 g at 25 ? c. part a what is its density in g/cm3 at this temperature?

The volume of the cube osmium metal is calculated by multiplying the given dimension to itself three times. 
                                    v = (1.5 cm)(1.5 cm)(1.5 cm)
                                    v = 3.375 cm³
Density is calculated by dividing the mass by volume.
                                    d = (76.31 g)/(3.375 cm³)
                                     d = 22.61 g/cm³

Thus, the density of the metal is approximately 22.51 g/cm³.