GCSE Chemistry > Haber Process. The Haber process is the process by which Ammonia is produced. Simply put, it involves combining Nitrogen and Hydrogen together as the second equation below shows. This is a reversible reaction. The nitrogen needed for the reaction comes from the fractional distillation of liquid air.
Sooner than later is a pretty new expression, picking up in the 1940s, though sooner or later is a much older and more common expression. As to its grammatical correctness; it is certainly idiomatic and idioms seem to be allowed a lot of latitude on the grammatical front.
Note: some HPT's say test 5 days before your period is due! or some such thing. Please note they are assuming a textbook 28-day cycle, with ovulation on Day 14. 5 days before your period is due thus really translates to 10 DPO. Essentially, you should remember that your high school biology textbook was WRONG.