Dear Student,

ANSWER

The molecular formula for compound is X2Y3.

EXPLANATION

Atomic mass of X -30g/mol

Atomic mass of Y -20g/mol

Both elements are present in equal masses in compund

Let the no of atoms in X and Y be n and m.

n*30 = m* 20

n=m*2/3

The molecular formula for compound can be written as XnYm

X2Y3

Thank you

ALL THE VERY BEST.