Question

0 so₃ → 0 so₂ + 0 o₂

Explanation:

Step1: Balance sulfur atoms

Assign coefficient 2 to $\text{SO}_3$ and $\text{SO}_2$:
$2\text{SO}_3
ightarrow 2\text{SO}_2 + \text{O}_2$

Step2: Balance oxygen atoms

Count O atoms: Left = $2\times3=6$, Right = $(2\times2)+(1\times2)=6$. Atoms are balanced.

Step3: Verify balanced equation

Confirm equal S (2 each) and O (6 each) on both sides.

Answer:

$2\text{SO}_3
ightarrow 2\text{SO}_2 + \text{O}_2$