Sodium chlorate decomposes to produce the oxygen and sodium chloride gas at the elevated temperatures. A sample of impure sodium chlorate which is having 0.8765 g was heated until the production of oxygen gas ceased. The oxygen gas collected over water occupied the 57.2mL at a temperature of 22C and a pressure of 734 torr. Determine the mass percent of NaClO3 in the original sample. (At 22C the vapor pressure of water is 19.8 torr)