Solid potassium chlorate decomposes upon heating to form solid potassium chloride and oxygen gas. A mixture of potassium chlorate and potassium chloride with a mass of 7.44 g is heated until all the potassium chlorate has decomposed. If 789mL of gas is collected over water is collected over water at .976 atmospheres and 30.0 C, explain what the percent potassium chlorate is in the original mixture? Vapor pressure of water is at 30.0 C = .023 atm.