Ammonia, NH3 (g), is produced when nitrogen gas reacts with hydrogen gas at 304 kPa and 25.0°C.  When 12.5 g of nitrogen react with 1.75 g of hydrogen, 3.77 L of ammonia produced.   a)  What is the percent yield for this reaction?  b)  What mass of excess reactant remains once the reaction is complete?

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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".