What is the half-life of a radioisotope? a.the amount of time it takes for half of the material to decay b.the amount of time a radioisotope exists as the parent element c.the amount of time it takes for a radioisotope to get halfway to a stable form d.the amount of time it takes for half of the radioisotope to form
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Ответ:
Ответ:
A catalyst speeds up a reaction by lowering the activation energy.
Explanation:
A catalyst has no effect on the equilibrium of a reaction.A catalyst does not add energy to a reaction neither does a catalyst consumed in a chemical reaction .
Therefore, A catalyst speeds up a reaction by lowering the activation energy.