Question

Iron has a density of 7.9 g/cm³. Gold has a density of 19.3 g/cm³.

I have a piece of metal that has a volume of 200 cm³ and a mass of 3.86 kg. Is it gold or iron?

Answer 1

density = m/v
3.86kg=3860g
d= 3860/200
= 19.3g/cm^3
therefore it is gold.