The number of unit cells present in a cubic shaped ideal crystal of NaCl of mass 0.4gr is `x xx 10^(21)`, then 'x' is ________

Answer

1

Explanation

NaCl, 1 unit cells `to` 4 NaCl pairs
`4 xx 58.5 gm to 6 xx 10^(23)` unit cell 0.4 gm `to` ?
`0.0102 xx 10^(23) = 1.02 xx 10^(21) , x=1`