Plz answer question (ii)

Modern weaponry has increased the number of deaths in wars and violent conflicts.

One of the few xenon compounds that form is cesium xenon heptafluoride (csxef7). how many moles of csxef7 can be produced from the reaction of 13.0 mol cesium fluoride with 12.5 mol xenon hexafluoride? csf(s) + xef6(s) csxef7(s)

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?