Zinc has two free electrons per atom and there are 1.31 x 10^23 free electrons/cm^3 of Zn.?

Zinc has two free electrons per atom and there are 1.31 x 10^23 free electrons/cm^3 of Zn. If the atomic mass is 65.37 g/mol and Avogadro’s number is 6.02 x 10^23, find the density of zinc.