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Gases emitted during volcanic activity often contain high concentrations of hydrogen sulfide and sulfur dioxide. these gases may react to produce deposits of sulfur according to the equation: 2 h2s(g) so2(g) → 3 s(s) 2 h2o(g) for the complete reaction of 6.41 mol of hydrogen sulfide:

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There can be three possible answers to this question: the amount of moles of SOâ‚‚ gas needed to react with 6.41 mol Hâ‚‚S, and the amount of S and Hâ‚‚O gas produced.

Amount of SOâ‚‚:
6.41 mol Hâ‚‚S (1 mol SOâ‚‚/2 mol 2 mol Hâ‚‚S) = 3.205 moles SOâ‚‚ gas

Amount of S:
6.41 mol Hâ‚‚S (3 mol S/2 mol 2 mol Hâ‚‚S) = 9.615 moles S solid

Amount of Hâ‚‚O:
6.41 mol Hâ‚‚S (2 mol Hâ‚‚O/2 mol 2 mol Hâ‚‚S) = 6.41 moles Hâ‚‚O gas

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