Astudent was asked to determine the densities of the four metals listed. the student was asked to determine the density of an unknown metallic substance. the metallic substance is an alloy. this particular alloy is a 50/50 mixture of two metals listed in the table. the student found the density of the alloy to be 9.32 g/cm3. according to the density, what two metals make up the alloy? a) lead and gold b) copper and tin c) copper and gold d) tin and lead