Limiting Reactants without a given mass This is a question I have for Chemistry homework, but I don't understand how to solve it without a given mass. I narrowed the choices down (see below _) I know a limiting reactant well limits the reaction (so if there are 2 reactants) and the react left is the excess reactant. 

I thought Propane would be the limiting reactant because the oxygen is in excess (though that was incorrect).

Then, I though Oxygen would be the limiting reactant (naturally) since its a combustion reaction (though that is incorrect). 

Determine whether each reaction depends on a limiting reactant. Explain why or why not and identify the limiting reactant. (Select all that apply.)

(c) Propane (C3H8) burns in excess oxygen to produce carbon dioxide and water.

Yes, one reactant is naturally limiting.
Yes, there are two reactants.
No, all reactants are in excess.
No, there is only one reactant.
propane
oxygen
carbon dioxide
water
Not enough information to identify which is the limiting reactant.



Yes, one reactant is naturally limiting.
Yes, there are two reactants.
No, all reactants are in excess.
propane
oxygen
Not enough information to identify which is the limiting reactant.
It seems that you would need information about how much of each reactant you have when conducting this. edit: "Excess" is the key word here; so it hints that Oxygen is NOT the limiting reagent. Considering how combustion reactions are structured, the answer seems to be the other reactant here.