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Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen:
4KNO3 (s) → 2K2O (s) + 2N2 (g) + SO2 (g)
To produce 76.3 kg of O2, how many
(a) moles of KNO3 must be heated?
(b) grams of KNO3 must be heated?