Industrially, vanadium metal, which is used in steel alloys, can be obtained by reacting vanadium(V) oxide with calcium at high temperatures: 5Ca + V2O5 longrightarrow 5CaO + 2V In one process, 1.540 × 103 g of V2O5 react with 2.120 × 103 g Ca. (a) Calculate the theoretical yield of V. g (b) Calculate the percent yield if 807.0 g of V are obtained. % Report your answers to the correct number of significant figures.

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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".