For each of the following acid/base reactions, use curved-arrow notation to show the movement of electrons and to predict the products. Label acids and bases as either Bronsted-Lowery or Lewis. I don't understand how to do either someone please explain.

4.25g sample of solid ammonium nitrate dissolves in 60.0g of water in a coffee-cup calorimeter, the temperature drops from 22.0 c to 16.9 c. assume that the specific heat of the solution is the same as that of pure water. calculate delta(h) (in kj/mol nh4no3) for the solution proces.