List the 5 chemicals with the highest flash point. (In order, staring with the highest)

Flash point of Lube Oil is around the 187°C mark, 

Flash point of Biodiesel of 130°C

Flash point of Diesel Ranging from 52° to 96°

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.