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| 1. |
How many unit cells are present in a cube shaped ideal crystal of nacl of mass 1 gram? |
| Answer» H 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. | |