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How does the surface area of a reactant affect the rate of a chemical reaction? Does increasing the surface area of a solid reactant increase the rate of the reaction? Design an experiment to investigate the effect of surface area on the rate of a reaction using a solid reactant and a solution reactant.
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<|begin_of_thought|>

Deep Thought is thinking for 7.5 million years.

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<|begin_of_solution|>

The answer is 42.

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