Question

$I$. Experimental data reveals that $1mole$ of a metal ($X$) combines with $3moles$ of a nonmetallic element ($Y$) to form a compound. The empirical formula of the compound is ${XY}_3$.
$II$. Empirical formulas are the lowest whole number ratio of elements in a compound.

• A. Statement $I$ is true, Statement $II$ is true and is a correct explanation of the phenomena described in $I$
• B. Statement $I$ is true, Statement $II$ is false
• C. Statement $I$ is false, Statement $II$ is true
• D. Statement $I$ is false, Statement $II$ is false

Answer 1

Answer: (A)

Statement $I$ is true, Statement $II$ is true and is a correct explanation of the phenomena described in $I$

Empirical formula is the simplest whole number ratio of elements present in the compound.

Given, $1mole$ of X react with $3moles$ of Y.

So, the empirical formula is $X{Y}_3$ because $X:Y=1:3$