The required moles of nitrogen which are needed to completely convert 6.34 moles of hydrogen is 2.11 moles.
Stoichiometry of any reaction gives idea about the relative amount of reactants and products are present in any chemical reaction in terms of moles.
Given chemical reaction is:
N₂ + 3H₂ → 2NH₃
From the stoichiometry of the reaction:
3 moles of H₂ = reacts with 1 mole of N₂
6.34 moles of H₂ = reacts with 1/3×6.34=2.11 moles of N₂
Hence required moles of nitrogen are 2.11.
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