A student carries out the reaction of $4\,\text{mol}$ of ammonia with oxygen to form only an oxide of nitrogen and water. In this reaction, each nitrogen atom has its oxidation state raised by $5$. What number of moles of oxygen gas reacts with $4\,\text{mol}$ of ammonia in this reaction?
- A$4\,\text{mol}$
- B$5\,\text{mol}$
- C$7\,\text{mol}$
- D$10\,\text{mol}$