What symbol shows that a reaction is reversible?
State the key conditions needed to make ammonia by the Haber process from hydrogen and nitrogen. Add a chemical equation to show the reaction that takes place.
Name one raw material that provides the hydrogen used in the Haber process.
What does the term base mean?
Name the industrial process by which sulfuric acid is manufactured.
Write the chemical equation for ammonia reacting with sulfuric acid.
Identify the green precipitate.
Suggest why the surface of the green precipitate becomes red-brown.
State what is observed when excess aqueous ammonia is added to the green precipitate.
Calculate the volume, in dm$^3$, of oxygen at room temperature and pressure that will react with 4.80 dm$^3$ of ammonia.
Use the bond energies in the table to calculate the energy change, in kJ/mol, when one mole of NH$_3$ reacts.