Given the following reaction: 2 KClO3(s) 2KClO3(s) + 3 O2(g)
What mass of KClO3 will produce 250mL of O2 gas, collected by water displacement, at an atmospheric pressure of 745 torr and a temperature of 30.0 C? The vapor pressure of water at 30.0 C is 31.8 torr.