I need the answer by 12❤️

An exothermic reaction is conducted in an insulated calorimeter filled with water. the calorimeter is then sealed so that there is no heat exchanged between the contents of the container and the surrounding air. which of the following statements is true about the reaction?

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?

How many moles of oxygen gas are produced from the decomposition of six moles of potassium chlorate