How many unit cells are present in a cube -Shaped ideal crystal of NaCl of mass 1.00 g ?[ Atomic mass : Na = 23, Cl = 35.5 ]

How many unit cells are present in a cube -Shaped ideal crystal of NaC

1.	How many unit cells are present in a cube -Shaped ideal crystal of NaCl of mass 1.00 g ?[ Atomic mass : Na = 23, Cl = 35.5 ]
Answer» ` 5.14 XX 10^(21)` ` 1.28 xx 10^(21)` `1.71xx 10^(21)` `2.57 xx 10^(21)` SOLUTION :One unit CELL has 4 NaCl UNITS, i.e, has mass `(4 xx 58.5)/(6.-02 xx 10^(23)) g` No. of unit cells is 1 g = `(6.02 xx 10^(23))/(4xx 58.5)` ` = 2 .57 xx 10^(21)`