{"knowledge_schema": {"broad_category": "Chemistry \u2192 Stoichiometry \u2192 Gas Reactions", "refinement": "This problem involves analyzing the reactions of an equimolar mixture of two salts upon heating and the subsequent gas reactions with various reagents.", "specific_scope": "The focus is on determining the total number of atoms in the salts based on the mass changes observed in the reaction products and the remaining gas volume.", "goal": "Calculate the total number of atoms in salts A and B by interpreting the data from the gas reactions and applying stoichiometric principles."}, "summary": "This problem requires an understanding of stoichiometry and gas laws to analyze the reactions of an equimolar mixture of salts A and B. By examining the mass changes in the tubes filled with different reagents and the volume of gas remaining, we can deduce the chemical composition of the salts. The goal is to determine the total number of atoms present in the salts based on the provided data. This involves calculating the contributions of each salt to the total mass and the resulting gases."}