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What must happen before a chemical reaction can begin? The activation energy must be exceeded. The activation energy must be reached. The concentrations of products and reactants must be equal. The concentration of reactant molecules must be reduced.

Timothy Norman

in Biology

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Nicholas Rivera on February 4, 2019

We have the avtivation energy of a reaction is the energy that is required for the molecules to start reacting. Therefore, the activation energy must be reached; it is enough to get to it and there is no need to overcome it. Higher could be the reaction faster. The last two options are clearly wrong. We can have a reaction such as the dissolution of the salt into Na and Cl ions, where the initial consentration of the product is 0, different fron the reagents. Also, the last sentence is a result of the reaction of starting, do not cause the onset of the reaction.

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