How many moles of oxygen are formed when 28.6 g of KNO3 deco…

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Hоw mаny mоles оf oxygen аre formed when 28.6 g of KNO3 decomposes аccording to the following reaction?  The molar mass of KNO3 is 101.11 g/mol. 4 KNO3(s)  →  2 K2O(s) + 2 N2(g) + 5 O2(g)

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