A student in the chemistry lab heated a sample of potassium chlorate solid KCIO, (M=122.55 g/mol). 3 The following reaction took place: 2 KClO 2 KCl +30₂ The oxygen gas (M=32 g/mol) produced was collected at 22 °C and 0.964 atm and of vasume 0.65 L. The mass of KCLO 3 that was decomposed in the above reaction is 0.83 2.12 3.17 28.37 grams.​