Enzymes in plants convert nitrate into ammonia. The unbalanced half-reaction equation is given below. What is the stoichiometric coefficient of the electrons, e^-, in the balanced reaction equation? NO₃^-(aq) + H₂O( ) + e^- $\rightarrow$NO₂^-(aq) + OH^-(aq)

Question

Quizplus · Accepted Answer

According to the unbalanced equation, there are 10 electrons on the left-hand side and none on the right-hand side. To balance the equation, we need to put a stoichiometric coefficient of 10 in front of the e^- in the balanced equation. Cancelling out the coefficients, we get the balanced equation as: NO3-(aq) + 10H+(aq) + 10e- → NH3(aq) + 5H2O(l) Therefore, the stoichiometric coefficient of electrons is 10/5 = 2. The best choice is B.

Enzymes in Plants Convert Nitrate into Ammonia →\rightarrow→ NO2-(aq) + OH-(aq) A) 1 B) 2 C) 3 D)

Enzymes in Plants Convert Nitrate into Ammonia $\rightarrow$ NO₂^-(aq) + OH^-(aq)
A) 1
B) 2
C) 3
D)