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Which statement accurately describes the role of a catalyst in a chemical reaction?

1. A catalyst offers a different pathway for the reaction that requires less activation energy.
2. The Arrhenius equation is expressed as K = Ae^(-Ea/RT).
3. The equation ln K = ln A - Ea/RT is used to describe reaction rates.
4. The activation energy can be calculated from the slope of a graph of ln K versus 1/T.

Correct answer: A catalyst offers a different pathway for the reaction that requires less activation energy.

Solution

A catalyst works by lowering the activation energy of a reaction, providing an alternative pathway for the reaction to proceed more efficiently.

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