which represents the empirical formula for x4y8?\no xy2\no x2y4\no x4y8\no xy

Answer:

A. $XY_2$

Explanation:

Step1: Recall empirical formula concept

Empirical formula has simplest - whole - number ratio.

Step2: Find ratio of elements in $X_4Y_8$

Divide sub - scripts by greatest common factor. GCF of 4 and 8 is 4.

Step3: Calculate new sub - scripts

For X: $\frac{4}{4}=1$, for Y: $\frac{8}{4}=2$. So empirical formula is $XY_2$.