Answer
First, note that the $H_2N$ is actually two Hydrogen molecules bonded to one Nitrogen molecule, which is intentionally not shown. Once we identify the two $H^+$ molecules, we see that one of the $H^+$ ion combines with the $OH^-$ ion on the other molecule to form water.
Work Step by Step
First, note that the $H_2N$ is actually two Hydrogen molecules bonded to one Nitrogen molecule, which is intentionally not shown. Once we identify the two $H^+$ molecules, we see that one of the $H^+$ ion combines with the $OH^-$ ion on the other molecule to form water.