Final answer:
The calculation of reactor times for percentage conversion in a batch reactor requires the reaction order and rate constant, which are not provided. Typically, with this information, the appropriate integrated rate law would be applied to calculate the times for a given conversion level.
Step-by-step explanation:
To calculate the batch reactor (BR) times to achieve 10%, 50%, and 80% conversion when 100 moles of A are charged to a 400 dm³ reactor, one must understand that this is a kinetics problem involving the determination of reaction times based on the percentage conversion of reactants to products. Without the specific rate law or reaction order, we cannot provide a numerical answer. However, typically, with the reaction order and rate constant, one could use integrated rate laws for zero-order, first-order, or second-order reactions to find the relationship between concentration and time. As an example, for a first-order reaction, the integrated rate law ln([A]0/[A]) = kt can be used, where [A]0 is the initial concentration, [A] is the concentration at time t, and k is the rate constant.
The reaction rate can be affected by various factors such as temperature, concentration of reactants, and presence of catalysts, which are not provided in the question. In the absence of specific rate data, the LibreTexts™ resources would typically be consulted to find relevant data or to perform calculations using principles such as Beer's law or by interpreting a differential rate law.