6. A mixture of KClO3 and KCl has a mass of 2.565 grams. The mixture is heated and the KClO3 is decomposed. After cooling its mass is found to be 1.980 grams. From the given data calculate the number of of moles of O2 lost from the mixture (molar mass of oxygen atom is 16.00 g/mol) 2KClO3 → 2KCl 3O2