The change from the liquid to the gas state of matter is known as . -freezing
-vaporization
-melting

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

Once similarity and one difference between a mixture of elements and a mixture of compounds

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.