Elemental phosphorus reacts with chlorine gas according to the equationP4(s)+6Cl2(g)→4PCl3(l)A reaction mixture initially contains 45.53 g P4 and 130.9 g Cl2. Once the reaction has reached completion, what mass (in g) of the excess reactant is left?         Express the mass in grams to three 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".