Ammonia is produced by combining hydrogen with nitrogen in the Haber process. Which row gives the sources of hydrogen and nitrogen and the conditions used to produce ammonia in the Haber process?
- AHydrogen: air; Nitrogen: natural gas; Temperature: $250\,^{\circ}\text{C}$; Pressure: $2\,\text{atm}$
- BHydrogen: air; Nitrogen: natural gas; Temperature: $250\,^{\circ}\text{C}$; Pressure: $200\,\text{atm}$
- CHydrogen: natural gas; Nitrogen: air; Temperature: $450\,^{\circ}\text{C}$; Pressure: $2\,\text{atm}$
- DHydrogen: natural gas; Nitrogen: air; Temperature: $450\,^{\circ}\text{C}$; Pressure: $200\,\text{atm}$