Which statement about chemical reaction rates is true?

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)