

InterviewSolution
Saved Bookmarks
1. |
How many unit cell are present in a cubic-shaped ideal crystal of `NaCl` of mass `1.0 g`?A. `1.28xx10^(21)` unit cellsB. `1.71xx10^(21)` unit cellsC. `2.57xx10^(21)` unit cellsD. `5.14xx10^(21)`unit cells |
Answer» Correct Answer - C `n=4` for `f.c.c.,` Also no. of atoms in `1 g NaCl=(6.-23xx10^(23))/(58.5)` No. of unit cell present in `1g NaCl` `=(6.023xx10^(23))/(58.5xx4)` `=2.57xx10^(21)` unit cell |
|