Oxygen gas as well as potassium chloride can be created by heating potassium chlorate in the presence of manganese dioxide as a catalyst. Explain how many moles of oxygen gas would be obtained from 1.3g of potassium chlorate? If this amount of oxygen were collected over water at 23c as well as at a total pressure of 745mmHg, what volume would it occupy? Vapor pressure is 21.1mmHg at 23c