Question

how many unit cells are present in a cube shaped ideal crystal of nacl of mass 1.00g​

Answer 1

Answer:

So, each unit cell has 4 atoms of each Na+ and Cl-. Hence there are total 4 molecules of NaCl in each unit cell. As the mass of -Avogadro number of molecules- of NaCl is 58.5g. So, 2.575×10^21 unit cells contains 1gm of NaCl molecules.