A 2.12 g sample of KClO3 (s) was heated to produce KCl (s) and O2 (g). The sample of oxygen was collected over water. The pressure of the atmospheric pressure was 754 torr and a temperature of 22C. The vapor pressure of water at 22C is 20 torr. Balance the equation , finmd the number of moles of oxygen produced, fine the volume under these conditions and find the density of oxygen.