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Reactant

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reactant
a substance that participates in a chemical reaction, esp a substance that is present at the start of the reaction

reactant [rē′ak·tənt]
(chemistry)
A substance that reacts with another one to produce a new set of substances (products).

Reactant 

a technical term for any of the substances that enter into a chemical reaction. Reactants used in laboratory work are called chemical reagents.



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The scientists load the membrane bubbles with one of two reactants for the nanoparticles.
The catalysts provide a surface for the chemical reaction to take place on, and in order for the reaction to occur, one or more of the reactants must diffuse to the catalyst surface and adsorb into it.
Stoichiometry is often used in balancing the equations of chemical reactions, in converting from grams to moles (or grams to milliliters), and to find the correct quantity of a reactant to be used in a reaction.
 
 
 
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