Solid State

A solid having density of 9$$\times$$10³ kg m^–3 forms face centred cubic crystals of edge length $$200\sqrt 2$$ pm. What is the molar mass of the solid? [Avogadro constant $$\cong$$ 6 $$\times$$ 10²³ mol^–1 , $$\pi$$ $$\cong$$ 3]