How many gram of iron pyrite FeS should be burnt completely

Last updated: 6/28/2023

How many gram of iron pyrite FeS should be burnt completely to produce sufficeint SO gas needed to decolourise completely 100 ml 0 12 M KMnO4 solution is acidic medium Fe 56 0 1 2 gm 1 8 gm 0 9 gm 00 36 gm