Answer
$N_{2} (g) + 6H_{2}O (l) + 6e^{-} → 2NH_{3}(g) + 6OH^{-} (aq)$
Work Step by Step
Since this is a basic solution, we add OH- ion to the right hand side and water on the left hand side to balance the equation. Since Nitrogen is going from oxidation state of 0 to -3, this is a reduction reaction.