D. barium nitride reacts with water to yield barium hydroxide and nitrogen trihydride.
Ba_3N_2 is Barium nitride, 6H2O is 6 water molecules, Ba(OH)_2 is Barium hydroxide, and NH_3 is nitrogen trihydride/ammonia.
(aq) = aqueous solution, (s) = solid, (g) = gas, and (l) = liquid.
So, D. barium nitride reacts with water to yield barium hydroxide and nitrogen trihydride.