Rate of a Reaction

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Chemical reactions can only happen if the reactant particles collide with enough .
The more frequently particles collide, and the greater the number of with enough energy, the greater the rate of reaction.
Some reactions are slow, such as , and some are fast, like .
The rate of reaction depends on the and concentration of the reactants, and the surface of any solid reactants.
The rate of reaction can be found by measuring the amount of used up, or the amount of product formed, in a given time.