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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Ashutosh singh
Dear Madhu, read this carefully! Let's say that in this balanced reaction, 2 moles of SO3 decompose to give 2 moles of SO2 and 1 mole of O2. It means if 2 moles of SO2 is decomposed at the reactant side, 2 moles of SO2 and 1 mole of O2 will be produced at the product side. Similarly, if 1 mole of SO2 is decomposed at the reactant side, only 1 mole of SO2 will be produced and 0.5 mole of O2 will be produced. It's simple molar calculations. Coming to your question, as you can clearly see that, 0.6 moles of SO2 is being dissociated...that's why 0.6 and 0.3 moles of SO2 and O2 will be formed at the product side.
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