The table showed that when the concentration of X was doubled, the initial reaction rate (r1) quadrupled.
Reactant is an element or compound that participates in a chemical reaction. It is one of the components of a chemical reaction, the other being the product. Reactants are usually the starting materials that are present before the reaction occurs, while products are the materials formed after the reaction. Reactants can be either elements or compounds, and they often undergo chemical changes during the reaction.
This indicates that the reaction is first-order with respect to X. Similarly, when the concentration of Y2 was doubled, the initial reaction rate (r2) quadrupled, indicating that the reaction is first-order with respect to Y2. This suggests that the overall reaction is second-order. From the data, it appears that the rate of reaction is proportional to the product of the concentrations of X and Y2.
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