Fe3Br8 – an important source of potassium bromide is produced through the following two-stage process:   Stage 1: 3 Fe + 3 Br2  3 FeBr2 Stage 2: 3 FeBr2 + Br2  Fe3Br8   The reaction in the first stage proceeds with a 92% yield, while the yield of the reaction in stage 2 is currently unknown. (Atomic masses: Fe = 55.85, Br = 79.9) (b) Considering that you used 71.55 g of bromine gas, Br2, for the reaction

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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".