Chemistry Stoichiometry Solution: Chromium(III) oxide reacts with hydrogen sulfide (...

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Solution: Chromium(III) oxide reacts with hydrogen sulfide (H2S) gas to form chromium(III) sulfide and water: Cr2O3(s) + 3H2S(g) ⟶Cr2S3(s) + 3H2O(l) To produce 421 g of Cr2S3, how many moles of Cr2O3 are required?