If a solution containing 53.99 g of mercury(II) chlorate is allowed to react completely with a solution containing 9.718 g of sodium sulfide, how many grams of solid precipitate will form?    How many grams of the reactant in excess will remain after 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".