An oxygen candle is a cylindrical chemical oxygen generator that contains a mix of sodium chlorate and iron powder, which when ignited smolders at about 600 °C (1,112 °F), producing

sodium chloride, iron oxide, and at a fixed rate about 6.5 man-hours of oxygen per kilogram of the mixture. The key reaction is:Chemical Oxygen Generator, \mathrm{NaClO}_{3} \rightarrow \mathrm{NaCl}+\mathrm{O}_{2} Assume that the oxygen candle can provide oxygen gas (02) at an average flow rate of 8.0 L/min for 40 min. Given the density of oxygen gas at standard conditions is 1.429 g/L, please estimate how many kilograms of sodium chlorate need to be used to manufacture one oxygen candle.