i’ll give u 20 points if u help!! surface area of reaction is decreased. you now have collisions and collision energy

The rate of a chemical reaction can be raised by increasing the surface area of a solid reactant. This is done by cutting the substance into small pieces, or by grinding it into a powder. If the surface area of a reactant is increased: more particles are exposed to the other reactant.

Explanation:

Reactant concentration, the physical state of the reactants, and surface area, temperature, and the presence of a catalyst are the four main factors that affect reaction rate.

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