Silver tarnishes in the presence of hydrogen sulfide and oxygen because of the following reaction: 4Ag+2H2S+O2 ==> 2Ag2S+2H2O How many grams of Ag2S could be obtained from a mixture of .05g Ag, .14g H2S, and .08g O2?

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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".