Question

A golden bar of metal (5 centimeters by 18 centimeters by 4 centimeters) being transported by armored car is suspected of being fake, made from a less valuable metal with a thin coating of pure gold. The bar is found to have a mass of 2.7 kilograms. if the specific gravity of gold is 19.3, is the bar fake? Justify your answer.

Answer 1

mass of pure gold would be

5*18*4 cm^3 * 19.3 g/cm^3 = 6948g

so, what do you think?

Answer 2

yes

Answer 3

not fake