Assuming the materials don't mix, show how the materials would "stack up" in a graduated cylinder. (Based on their densities) (Just order what would go with the arrow from top to bottom please. ^^)

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.