A mixture of N2(g) and H2(g) reacts in a closed containerto form ammonia, NH3(g). The reaction ceases beforeeither reactant has been totally consumed. At this stage3.0 mol N2, 3.0 mol H2, and 3.0 mol NH3 are present. Howmany moles of N2 and H2 were present originally?

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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".