What type of chemical reaction
SO2 --> S + O2

How are isotopes of the same chemical element alike? how are they different?

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.

How many moles of water are created if 3 moles of hydrogen react completely with excess oxygen?