Question

Gaseous ammonia chemically reacts with oxygen O2 gas to produce nitrogen monoxide gas and water vapor. Calculate the moles of oxygen needed to produce 1.80mol of water

Answer 1

Answer : The number of moles of oxygen needed are, 1.5 moles.

Explanation :

The balanced chemical reaction will be:

$4NH_3+5O_2\rightarrow 4NO+6H_2O$

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 $\frac{5}{6}\times 1.80=1.5$ moles of oxygen

Therefore, the number of moles of oxygen needed are, 1.5 moles.