Question

relative density of copper is 8.9. find density in kg/m3 and g/cm3

Answer 1

Relative density of a substance is it's density with respect to pure water at 4°C.

At 4°C, the density of pure water is 1 g/cm^3

So, as relative density of copper is 8.9, its density is 8.9 g/cm^3

On converting it to SI units, it becomes 8900 kg/m^3

So, the density is copper is 8.9 g/cm^3 or 8900 kg/m^3