What is the ratio of empirical formula mass to molecular formula mass of benzene

Q. The empirical formula of a substance with molar mass $180$ is $C{H}_{2}O$. The ratio of molecular formula mass to empirical formula mass is $x:y$. Then, the value of $x+y$ is :

Q. Empirical formula = C_{​​​​​​2}​​​​​H_​4​​​O
n=2
(​​​​​​n=molecular mass ÷ emperical formula mass
Emperical formula mass = 44
Molecular mass = 88)
molecular formula = n × empirical formula
= 2 × C₂H₄O
= C₄H₈O_​​​2
but the book answer is given that C₄H₈O
Which is correct ? If the book answer is correct , tell me how ?

Q. The molecular mass of butyric acid was determined by experiment to be 88 $gmo{l}^{-1}$. What is the molecular formula?
Empirical formula=.$C_2{H}_{4}O$

Q. In the following question, a statement of assertion (A) is followed by a statement of reason (R):
(A): The ratio of molecular formula mass and empirical formula mass must be a natural number.
(R): The empirical formula can never be the same as the molecular formula.

Q. A compound of relative molecular mass 34 and empirical formula $HO$ has the molecular formula :