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A one step chemical reaction can only have one limiting reagent because (as long as the 2 reactants are present in different amounts and/or you need different amounts for the reaction) you will run out of one first. Therefore, the reaction will not be able to continue because you will be out of one of the reactants you need for the reaction. The one you run out of is the limiting reactant, while you still have some of the other reactant left over.
The limiting reagent is the reactant that gets used up first in a chemical reaction. It determines how much product is produced. There cannot be two limiting reagents because once one reactant is used up the reaction cannot continue.
There is only one limiting reactant in a single step chemical reaction. If the moles are the same for all reactants none of them are limiting the others' potential to create more product. Thus, there is a perfect amount of reactant to fully react with the others in order to form product.
In one step-reactions, there will only be one limiting reactant. It is possible that all the substance involved in a reaction is completely consumed, in which there are no limiting reagents or all the reactants are limiting.
There can only be one limiting reagent in a reaction. Since the limiting reagent determines the amount of product that can be created, once it has been used it would not make sense that another reactant could limit an already determined product.
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