After 34.8 min a 43.5g sample of Fr-215 has decayed down to 10.0g what is its half life
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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.