Diamond has a face-centered cubic unit cell, with four more C atoms in tetrahedral holes within the cell. Densities of diamonds vary from 3.01 g/cm3 to 3.52 g/cm3 because C atoms are missing from some holes. (a) Calculate the unit-cell edge length of the densest diamond. cm (b) Assuming the cell dimensions are fixed, how many C atoms are in the unit cell of the diamond with the lowest density? Your response differs from the correct answer by more than 10%. Double check your calculations. atoms/unit cell