Chemistry
O<sub>2</sub> is evolved by heating KClO3 using MnO<sub>2</sub> as a catalyst. 2KClO<sub>3</sub> 2KCl + 3O<sub>2</sub> (i) Calculate the mass of KClO<sub>3</sub> required to produce 6.72 litre of O<sub>2</sub> at STP. (atomic masses of K = 39, Cl = 35.5, 0 = 16). (ii) Calculate the number of moles of oxygen present in the above volume and also the number of molecules. (iii) Calculate the volume occupied by 0.01 mole of CO<sub>2</sub> at STP.
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