{"knowledge_schema": {"broad_category": "Chemistry \u2192 Stoichiometry \u2192 Chemical Reactions", "refinement": "This problem involves analyzing the products of thermal decomposition of salts and the subsequent reactions of gases with specific reagents.", "specific_scope": "The focus is on determining the total number of atoms in the original salts A and B based on the mass changes observed in the reaction products and the remaining gas volume.", "goal": "Calculate the total number of atoms in the salts A and B by interpreting the data from the reactions and applying stoichiometric principles."}, "summary": "This problem is rooted in chemistry, specifically in stoichiometry and chemical reactions. It describes the thermal decomposition of an equimolar mixture of two salts, A and B, and the subsequent reactions of the gases produced. By analyzing the mass changes in the tubes filled with different reagents and the volume of gas remaining, we can deduce the total number of atoms present in the original salts. The answer to the problem indicates that the total number of atoms in salts A and B is 17."}