Write the name for the compound Al₂S₃

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?

Draw a line graph showing the relationship between temperature in kelvin as a function of kinetic energy.

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.