Chem! why do we use roman numerals (aka stock system) when you write the name for a compound with (example: ) tin in it even though it’s a main group metal?

Two liquids are poured into a beaker. after a few seconds, the beaker becomes warm. which of the following best describes this reaction? a. an exothermic reaction b. a decomposition reaction c. an endothermic reaction d. a single-displacement reaction