Limiting reactant : N₂
Excess reactant : H₂
amount of NH₃ : 8 molecules
The reaction equation is the chemical formula of reagents and product substances
A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.
Reaction
[tex]\tt N_2+3H_2\rightarrow 2NH_3[/tex]
limiting reactant = smaller mol ratio
[tex]\tt \dfrac{4}{1}=4[/tex]
[tex]\tt \dfrac{15}{3}=5[/tex]
limiting reactant ⇒ N₂
The number of reacted H₂ molecules :
[tex]\tt \dfrac{3}{1}\times 4=12[/tex]
The remaining H₂ after the reaction :
[tex]\tt 15-12=3~molecules[/tex]
Amount of NH₃ :
[tex]\tt \dfrac{2}{1}\times 4=8~molecules[/tex]