Answer : The number of moles of oxygen needed are, 1.5 moles.
Explanation :
The balanced chemical reaction will be:
[tex]4NH_3+5O_2\rightarrow 4NO+6H_2O[/tex]
Now we have to calculate the moles of oxygen.
From the balanced chemical reaction we conclude that,
As, 6 moles of water vapor produces from 5 moles of oxygen
So, 1.80 moles of water vapor produces from [tex]\frac{5}{6}\times 1.80=1.5[/tex] moles of oxygen
Therefore, the number of moles of oxygen needed are, 1.5 moles.
