What happens to a ratio when an excess quantity of a reactant exists?
Nothing. A significant excess of one reactant over another in a two component reaction simply guarantees that the reactant in lower amount is completely consumed.
Regardless of the quantities of reagents mixed in a reaction, the reaction ratio will remain the same. One reactant will be totally consumed and any other reactants will remain in excess unreacted.
Assume 5 moles of each reactant in the following equation is mixed and the process goes to completion.
All of the