When placed in a pycnometer, 20 g of salt displaces 7.6 g of kerosene. If the mass density of kerosene is 0.83 g/cm^3, find the volume and density of the salt. An irregular metallic solid has a mass of 35 g. If its length is 10 cm, its width 8 cm, and its thickness 5 cm, what is the mass density of the metal? A thin sheet of gold foil has an area of 3.05 cm^2 and a mass of 6.3 mg. How thick is the foil? The mass density of gold is 19,300 kg/m^3.