Problem: A change in temperature from 10°C to 20°C is found to double the rate of a particular chemical reaction. How did the change in temperature affect the reacting molecules?(A) The average velocity of the molecules doubled(B) The average energy of the molecules doubled(C) The number of collisions per second doubled(D) The number of molecules above the reaction energy threshold doubled. 

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A change in temperature from 10°C to 20°C is found to double the rate of a particular chemical reaction. How did the change in temperature affect the reacting molecules?

(A) The average velocity of the molecules doubled

(B) The average energy of the molecules doubled

(C) The number of collisions per second doubled

(D) The number of molecules above the reaction energy threshold doubled. 

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