A catalyst: A. is used to kill weeds B. promotes a chemical reaction C. provides plants with nutrients D. is produced by chloroplasts
Biology · Middle School · Mon Jan 18 2021
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B. promotes a chemical reaction.
A catalyst is a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change. It works by providing an alternative reaction pathway with a lower activation energy than the uncatalyzed pathway, allowing more reactant particles to have enough energy to react when they collide. This means that reactions can occur at a faster rate or at a lower temperature than they would without the catalyst.