# A compound formed by elements X and Y has a cubic structure in which X atoms are at the corner of the cube and also at the face centers. Y atoms are present at the body center and at the edge center of the cube.(b) If all the atoms are removed from one of the body diagonals of the cube, calculate (i) $Z_{eff}$, (ii) total number of atoms in the cube, and (iii) formula of the compound.

(i) 27/4,(ii) 24,(iii) $X_{15}Y_{22}$