A cubic solid is made up of two elements X and Y . Atoms of X are...

The share of the atom present at corner of the cube is $1 / 8$. The share of the atom at face centre is $1 / 2 .$ Hence, the molecule can be represented as follows,

${X}_{4 \times \dfrac{1}{8} + 1 \times 1}{Y}_{6 \times \dfrac{1}{3} \times \dfrac{1}{2}}$

$⇒ {X}_{\dfrac{1}{2} + 1}{Y}_{1}$

$⇒ X\dfrac{2}{3}{Y}_{1}$

$⇒ {X}_{1 . 5}{Y}_{1}$(Empirical formula)

$⇒ {X}_{3}{Y}_{2}$.