Watch the video below.
As soon as a chemical reaction starts, reactants are being converted into products. As this happens, reactants decrease and products increase. The reaction stops as soon as 1 reactant runs out. The first reactant to run out is the limiting reactant. The reactant(s) left over is/are the excess reactants. To learn how to find the limiting and excess reactant, watch the following videos. Each video will show you a different way to determine the limiting and excess reactant.
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https://youtu.be/ymCZ2ShhBAw
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https://youtu.be/Mlu_v8rE1TY
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