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

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

A) 1
B) 2
C) 3
D) 4
E) 5