Saved Bookmarks
| 1. |
Derive the expression to calculate density of unit cell. |
|
Answer» Solution : LET the edge length of unit cell = a pm `therefore`VOLUME of unit cell `= a^3 xx 10^(-30) cm^3` Let the no. of atoms persent per unit cell - Z HENCE, the mass of ATOM `(m) = (M)/(N_A)` present in unit cell . M = MOLAR mass, `N_A` = Avogadro.s number The total mass of unit cell = `(Z xx M)/(N_A)` The density of a unit cell is given by d = `("Total mass of unit cell")/("Total volume of unit cell")` `d = (Z xx M)/(N_A xx a^3 xx 10^(-30)) g/(cm^3)`. |
|