Oxygen gas is formed by the following reaction:
2 NO (g) →O₂ (g) + N₂ (g) . If during a given time period the rate of formation of O₂ is 0.054 mol/L × s, what is D [NO]/ D t in mol/L × s?

Question

Oxygen gas is formed by the following reaction: 2 NO (g)→O₂ (g) + N₂ (g). If during a given time period the rate of formation of O₂ is 0.054 mol/L × s, what is D [NO]/ D t in mol/L × s?

Quizplus · Accepted Answer

- 0.11The reaction shows that 2 moles of NO decompose to form 1 mole of O2 and 1 mole of N2. Therefore, the rate of disappearance of NO is twice the rate of formation of O2. Since the rate of formation of O2 is 0.054 mol/L × s, the rate of disappearance of NO is 2 × 0.054 = 0.108 mol/L × s. The negative sign indicates the concentration of NO is decreasing, so the correct answer is -0.11 mol/L × s.

Oxygen Gas Is Formed by the Following Reaction