In chemical reactions, the rate of reaction is often influenced by various factors. Consider a hypothetical reaction: 2A + B ⟶ C where A and B are reactants and C is the product. The reaction rate is found to be extremely slow under normal conditions. However, a catalyst is introduced that significantly enhances the rate of reaction. Explain the mechanism by which the catalyst increases the rate of the reaction. Additionally, discuss the factors that determine the effectiveness of a catalyst in promoting a chemical reaction.

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