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AQA AS-level ChemistryAmount of SubstanceLesson 17 of 33

Sulfur dioxide reacts with oxygen to form sulfur trioxide.

2 SO2(g) + O2(g) ⇌ 2 SO3(g)

A mixture of gases forms containing 0.025 mol of sulfur dioxide, 0.049 mol of oxygen and 0.034 mol of sulfur trioxide.

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