What is a 21-cm radiation?

Llama have 74 chromosomes how many chromosomes will they be found in their gametes explain how you know

What is the most stable monatomic ion formed from nitrogen

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.