Answer
$C_{x}O_{y}=C_{2}O_{3} $
Work Step by Step
1. First we need to find the two numbers that are in relation $2:1$ of which the first number is divisible with the molecular mass of oxygen(16) while second is divisible with molecular mass of carbon(12).
$2:1=24:12=48 :24$
2. Next to get the number of atoms of each element in a molecule of $C_{x}O_{y}$, we divide the numbers we previously obtained. First one with the oxygen's molecular mass and second one with carbon's.
$x= \frac{24}{12}=2 ;\ y=\frac{48}{16}=3$
Therefore $C_{x}O_{y}=C_{2}O_{3} $
