One way to identify a substance is to compare the density of the substance with the density of a known substance. suppose a cube of a silver-colored metal with a volume of 64 cm3 has a mass of 672 g. the density of pure silver is known to be 10.5 g/cm3. based on this information, could the metal be pure silver? a. no. the density is greater than pure silver's. b. no. the density is less than pure silver's. c. yes. the density equals that of pure silver.