)Hoàn thành sơ đồ phản ứng, ghi rõ điều kiện nếu có

S → SO2 → SO3 → H2SO4 → BaSO4

They are like other investigations? say there was a murder u have to do blood test and finger prints which run through a lab. 

Answer trigonal pyramidal;

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.