correct the grammar;Our group was assigned the multiple application trapezoidal rule. It was used to improve the accuracy where the integration interval was divided into a number of segments and yielded the integral for the entire interval. Eight step sizes were needed to obtain the acceptable relative error of 0.0003, signifying that the integration achieved the given conditions. Our step size affected the accuracy of the numerical integration. We found that when we increased the number of iterations, the step size decreased, and the accuracy of the integration improved up to 0.000272. However, we also discovered that increasing the number of iterations will take time to perform the calculations. Conversely, when we decreased the number of iterations, we found that the step size increased, there was a significant error value higher than our acceptable relative error. The calculated catalyst weight needed to reach a conversion of 80% was 36,135 grams