JEE Main 2021 Chemistry question

ChemistryThe Solid StateJEE Main 2021

Not in JEE Main or NEET syllabus

Ga (atomic mass 70 u) crystallizes in a hexagonal close packed structure. The total number of voids in 0.581 g of Ga is . (Round off to the Nearest Integer.)

Answer: 15

Solution

Question ID VK-017785