How do you think advancements in science and technology lead to updates on how we model the atom?

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

What substance has a mass of 9.5g and volume of 2.1cm^3

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.