{"knowledge_schema": {"broad_category": "Chemistry \u2192 Stoichiometry \u2192 Chemical Reactions", "refinement": "This problem involves analyzing a chemical reaction involving salts and the gases produced during heating, as well as the subsequent reactions with various reagents.", "specific_scope": "The focus is on determining the total number of atoms in the salts A and B based on the mass changes observed in the reaction products and the remaining gas.", "goal": "Calculate the total number of atoms in the chemical formulas of salts A and B using the provided data about mass changes and gas volumes."}, "summary": "This problem is rooted in chemistry, specifically stoichiometry and chemical reactions. It describes the heating of an equimolar mixture of two salts, A and B, and the subsequent reactions that occur with various reagents. The goal is to determine the total number of atoms present in the chemical formulas of the salts based on the mass changes observed in the reaction products and the volume of gas remaining. By analyzing the data, students can deduce the chemical composition of the salts and calculate the total number of atoms."}