Regents Prep: Chemistry Multiple-Choice Questions

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Question 4 of 16   Kinetics/Equilibrium

This question may require the use of the Chemistry Reference Tables or the Periodic Table of Elements. Which statement explains why the speed of some chemical reactions is increased when the surface area of the reactant is increased?  1.  This change increases the density of the reactant particles.  2.  This change increases the concentration of the reactant.  3.  This change exposes more reactant particles to a possible collision.  4.  This change alters the electrical conductivity of the reactant particles.

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