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The chemical reactions of SO2, SO3, and SO at room temperature are as follows:
SO2
+ Reaction with water: SO2(g) + H2O(l) → H2SO3(aq)
+ Reaction with oxygen: 2 SO2(g) + O2(g) → 2 SO3(g)
SO3
+ Reaction with water: SO3(g) + H2O(l) → H2SO4(aq)
SO
+ Reaction with oxygen: 2 SO(g) + O2(g) → 2 SO2(g)
Note: SO is a highly reactive molecule that is not stable at room temperature. It quickly reacts with oxygen to form SO2.