States of Matter (Gaseous and Liquid States)

NaClO3 is used, even in spacecrafts, to produce O2. The daily consumption of pure O2 by a person is 492L at 1 atm, 300K. How much amount of NaClO3, in grams, is required to produce O2 for the daily consumption of a person at 1 atm, 300 K ?
NaClO3(s)+Fe(s) →O2(g)+NaCl(s)+FeO(s)
R=0.082L‌atm‌mol−1‌K−1