Question

Iron has a density of 7.86 g/cm3. calculate the volume (in dl) of a piece of iron having a mass of 4.15 kg . note that the density is provided in different units of volume and mass than the desired units of volume (dl) and the given units of mass (kg).

Answer 1

D = m / V V = m / D V = 4770 g / 7.86g/cm³ V = 606.9 cm³
V = 606.9 cm³ x (1 dL / 100 cm³) V = 6.069 dL
The answer, 6.07 dL, is reported to three significant digits due to the precision reported for the density.