Large quantities of ammonia are burned in the presence of a platinum catalyst to give nitric oxide,

Question

Large quantities of ammonia are burned in the presence of a platinum catalyst to give nitric oxide, as the first step in the preparation of nitric acid. NH₃(g) + O₂(g) $\overset{\quad pt\quad}{\rightarrow}$NO(g) + H₂O(g) (Unbalanced)

Suppose a vessel contains 0.12 moles of NH₃ and 0.14 of moles O₂. How many moles of NO may be obtained?

Accepted Answer

$NH_{3} + \frac{5}{4}O_{2} \rightarrow NO + \frac{3}{2}H_{2}O$For 0.12 mole of NH3, 0.15 mole of O2 is required.As O2 is the only 0.14 mole, it is a limiting reagent.

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