The number of atoms/cm3 = 8/a3 = 8 / (5.43 X 10-8 cm)3 = 4.996 x 1022 atoms/cm3 If 6.02 x 1023 silicon atoms make 28.1g; then 4.996 x 1022 atoms should weigh 2.332 g. Thus the density of silicon is 2.332 g/cm3.
The number of atoms/cm3 = 8/a3
= 8 / (5.43 X 10-8 cm)3 = 4.996 x 1022 atoms/cm3
= 8 / (5.43 X 10-8 cm)3
= 4.996 x 1022 atoms/cm3
If 6.02 x 1023 silicon atoms make 28.1g; then 4.996 x 1022 atoms should weigh 2.332 g. Thus the density of silicon is 2.332 g/cm3.