Under appropriate conditions,nitrogen and hydrogen undergo a combination reaction to yield ammonia: N₂ (g) + 3H₂(g) → 2NH₃(g)
If the reaction yield is 81.4 %,how many moles of N₂are needed to produce 8.50 mol of NH₃?

Question

Quizplus · Accepted Answer

According to the balanced chemical equation, 1 mole of N₂ reacts to produce 2 moles of NH₃. Therefore, 4.25 moles of N₂ (8.50/2) would be required to produce 8.50 moles of NH₃. Since the reaction yield is 81.4%, we need to divide the required amount by 81.4% in order to find the amount of N₂ needed initially: N₂ moles needed = 4.25 moles ÷ 0.814 = 5.22 moles Therefore, the correct choice is C.

Under Appropriate Conditions,nitrogen and Hydrogen Undergo a Combination Reaction to Yield