Limiting Reagent Steps

Step 1: Convert all amounts to moles.
Step 2: Divide moles of each reactant by its coefficient in the balanced equation.
Step 3: The reactant with the smallest ratio is the limiting reagent.

Key Ideas

The limiting reagent determines the maximum amount of product.
The other reactant is in excess — some will be left over.
If given grams, convert to moles first using molar mass.

Limiting Reagent

Given the balanced equation and amounts of two reactants, identify which is the limiting reagent.

Which is the limiting reagent?

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