Final answer:
The chemical equation provided is a two-step reaction where SO2 gas reacts with oxygen gas to form SO3 gas. The new reaction woulb looking like be SO2 (g) + 0.5O2 (g) → SO3 (g).
Step-by-step explanation:
The chemical equation you provided is: S02 (g) + ½02 (g) → 503 (g).
This is a two-step reaction where SO2 gas reacts with oxygen gas to form SO3 gas. The reaction coefficients indicate that 1 mole of SO2 reacts with 1/2 mole of oxygen to produce 1 mole of SO3.
To express the answer using one decimal place, you would write the reaction as: SO2 (g) + 0.5O2 (g) → SO3 (g).