To answer this question a balanced chemical equation is necessary. The correct equation is: N2 + 3H2 = 2NH3
From this equation, one mole of nitrogen react with 3 moles of hydrogen to give 2 moles of ammonia.
Therefore, the mole ratio of NH3 to N2 is 2:1
I don't know what you mean by type of 18, but it is called inorganic chemistry.
About 1.051 moles (depends on how u round it)
The Farenheit and Celcius scales can have negative numbers
