Final answer:
When the amount of a substance in a given volume is increased, it alters the concentration of that substance.
Step-by-step explanation:
When the amount of a substance in a given volume is increased, the concentration of that substance is being altered. Concentration refers to the amount of a solute present in a given volume of solution. Increasing the concentration of a substance in a reaction mixture can lead to an increase in the rate of reaction.
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