A problem in Stochiometry.

Chemistry Level 2

One litre of an acidified solution of K M n O 4 KMnO_4 containing 15.8 gm of K M n O 4 KMnO_4 is decolourised by passing sufficient amount of S O 2 SO_2 . If S O 2 SO_2 is produced by roasting of iron pyrites( F e S 2 FeS_2 ), what will be the amount of pyrites required for the production of necessary amount of S O 2 SO_2 ?(answer in grams)


The answer is 15.

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