Determine the numbers of moles of s8 molecules

Question

The rhombic Sis all converted to monoclinic S (density 1.96g/cm³⁾ to get a volume of4.22cm³ monoclinic S. 8.28g of rhombic S (density 2.07g/cm³⁾ occupies 4 cm3.  Both allotropic forms of sulfur consist of discrete cyclic S₈ molecules. Determine the numbers of moles of S₈ molecules are in the sulfur sample where the molar mass of S= 32.1g so molar mass of S₈ = 257g