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How many unit cell are present in a cubic-shaped ideal crystal of `NaCl` of mass `1.0 g`?A. `2.57xx10^(21)` unit cellsB. `5.14xx10^(21)` unit cellsC. `1.28xx10^(21)` unit cellsD. `1.71xx10^(21)` unit cells |
Answer» Correct Answer - A `(1)/(58.5)xx6.023xx10^(23)=1.029xx10^(22)` A unit cell contains `4Na^(+)` ion and `4Cl^(-)` ions `therefore` Unit cell `=(1.029xx10^(22))/(4)=2.57xx10^(21)` unit cell. |
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