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Chemistry, 29.06.2021 01:00 sophiaa23

The second reaction in the formation of sulfuric acid occurs slowly. 2 upper S upper O subscript 2 (g) plus upper O subscript 2 (g) right arrow 2 upper S upper O subscript 3 (g).

NO2 is added to the reaction to speed it up. In which form would this substance be a homogeneous catalyst for this reaction?
NO2(g)
NO2(l)
NO2(s)
NO2(aq)

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