Limiting Reactant: If 11.5 g of zinc reacts with 9.55 g of nitrogen gas how many grams of zinc nitride will be
produced? Identify the limiting and excess reactants.
3 Zn + N2 + Zn3N2
Theoretical Yield:
Limiting Reactant:
Excess Reactant:

Zn as a limiting reactant

N₂ as an excess reactant

Theoretical Yield : 13.15 g

Reaction

3 Zn + N₂ ⇒ Zn₃N₂

Ar Zn : 65,38 g/mol

Ar N₂ : 28.0134 g/mol

mol Zn

mol N₂

limiting reactant : the smaller ratio(mol:coefficient)

mol ratio Zn : N₂ :

Zn as a limiting reactant(smaller ratio)

N₂ as an excess reactant

mol Zn₃N₂ :

mass of Zn₃N₂ (Theoretical Yield) :