Question

Which will decrease the rate of a reaction?

changing the temperature from 90ºC to 40ºC
adjusting the concentration from 30 ng to 60 ng
placing the substance in a smaller container
grinding the substance into a powder

Answer 1

Step-by-step explanation:

The reaction rate decreases with a decrease in temperature. Catalysts can lower the activation energy and increase the reaction rate without being consumed in the reaction. Differences in the inherent structures of reactants can lead to differences in reaction rates.