6. A green colouring material was placed at the centre of a circular piece and allowed to dry. Drops of a solvent were added at the centre and eventually circles were produced as shown below.
(a)Name a suitable solvent for this experiment.
(1 mark)

In the haber reaction, patented by german chemist fritz haber in 1908, dinitrogen gas combines with dihydrogen gas to produce gaseous ammonia. this reaction is now the first step taken to make most of the world's fertilizer. suppose a chemical engineer studying a new catalyst for the haber reaction finds that 671 liters per second of dinitrogen are consumed when the reaction is run at 271c and 0.99atm. calculate the rate at which ammonia is being produced. give your answer in kilograms per second. round your answer to significant digits.