Question

Iron has a density of 7.86 g/cm3. Calculate the volume (in dL) of a piece of iron having a mass of 4.26 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). You will need to express the density in kg/dL (1 cm3 = 1 mL) before calculating the volume for the piece of iron

Answer 1

Density is a physical property which describes the mass of a substance per unit of volume of the substance. It is expressed as Density = m / V. We use this expression to calculate for the volume of the iron given. 

Density = m/V
7.86 g/cm^3 = 4260 g / V
V = 541.98 cm^3 

Converting to units of dL, 

V = 541.98 cm^3 (1 mL / 1cm^3) ( 1 dL / 100 mL) = 5.42 dL