The Total solution for NCERT class 6-12
Number of close-packed particles = 0.5 × 6.022 × 10_23 = 3.011 × 10_23
Therefore, number of octahedral voids = 3.011 × 10_23
And, number of tetrahedral voids = 2 × 3.011 × 10_23 = 6.022 ×10_23
Therefore, total number of voids = 3.011 × 10_23 + 6.022 × 10_23 = 9.033 × 10_23