In an old trunk, you find a cube of metal that you think may be aluminum, silver, lead, cobalt or tin. in lab you find that it has a mass of 222 g and a length of 2.7 cm. what is the metal? the density of each metal is given below at room temperature. o lead (11.3 g/cm) o silver (10.5 g/cm) cobalt (8.90 g/cm) o tin (7.31g/cm) aluminum (2.70 g/cm)