The balanced equation for the reaction of nitrogen and fluorine gas to form nitrogen tri...

The balanced equation for the reaction of nitrogen and fluorine gas to form nitrogen trifluoride is

What is the limiting reactant when each of the following sets of quantities of reactants is mixed?

(a) 9 N₂ molecules and 9 F₂ molecules

(b) 5 N₂ molecules and 20 F₂ molecules

(c) 6 N₂ molecules and 18 F₂ molecules