Cr2O3 (s) + 3 H2S (g) → Cr2 S3 (s) + 3 H2O (1) Chromium(III) oxide reacts with hydrogen sulfide gas to form chromium(II) sulfide and water according to the equation above. How many grams of Cr2S3 can be made by reacting 8 grams of Cr2O3? What is the maximum amount of oxygen gas, in grams, that can be gotten out of 2.87 grams of Fe2O3? Enter a number. 2 Fe2O3 (s) – 4 Fe(s)+ 3 O2 (9)

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".