Zn as a limiting reactant
N₂ as an excess reactant
Theoretical Yield : 13.15 g
Further explanation
Reaction
3 Zn + N₂ ⇒ Zn₃N₂
Ar Zn : 65,38 g/mol
Ar N₂ : 28.0134 g/mol
mol Zn
[tex]\tt \dfrac{11.5}{65.38}=0.176[/tex]
mol N₂
[tex]\tt \dfrac{9.55}{28.0134}=0.341[/tex]
limiting reactant : the smaller ratio(mol:coefficient)
mol ratio Zn : N₂ :
[tex]\tt \dfrac{0.176}{3}\div \dfrac{0341}{1}=0.0586\div 0.341[/tex]
Zn as a limiting reactant(smaller ratio)
N₂ as an excess reactant
mol Zn₃N₂ :
[tex]\tt \dfrac{1}{3}\times 0.176=0.0586[/tex]
mass of Zn₃N₂ (Theoretical Yield) :
[tex]\tt 0.0586\times 224.154~g/mol=13.15~g[/tex]
