How many moles of N are in 0.207 g of N20?​

What provides structure to the human body?

In 2002, the rare earth elements mine in mountain pass, california was closed because

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.