Question

ammonia is formed from the reactants nitrogen and hydrogen

Answer 1

N2 + 3 H2    ==>   2 N H3

 x       3 * x               2 * x

   x liters of Nitrogen and 3 x liters of Hydrogen produce 2 x liters of Ammonia.

Initially V liters of N2,  and  3*V liters of H2 are present.  Only 10% conversion took place.

So  0.90 V liters of N2 and 2.70 V liters of H2 are remaining. And, 0.20 V liters of Ammonia is produced.

Produced Ammonia has a volume equal to 20% of initial volume of Nitrogen.

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Answer 2

N2+3H2----->2NH3



this process is called Haber process