A #4.50g# #NH_3# reacts with #4.50g# #O_2#. What is the limiting reactant and how much excess remains after the reaction?
The limiting reactant is oxygen. The amount of excess ammonia that remains after the reaction is 1.31 g.
The complete combustion of ammonia yields nitrogen gas
We need to determine the molar masses of the reactants and one product. I chose
Moles of Ammonia and Water
Divide given mass by molar mass.
The limiting reactant is the reactant that yields the lesser amount of a product, in this case
For each reactant, multiply moles of reactant times the mole ratio from the balanced equation so that nitrogen is on top, then multiply times the molar mass of the chosen product, in this case nitrogen gas.
The limiting reactant is
The reactant in excess is
Mass of Ammonia that Reacted
The Amount of Excess Ammonia
The amount of