Ammonia can be made by reaction of water with magnesium nitride:
__ Mg₃N₂(s) + __ H₂O(l) → __ Mg(OH) ₂(s) + __ NH₃(g)
When the equation is properly balanced,the sum of the coefficients is

Question

Quizplus · Accepted Answer

To balance the equation, we need 3 Mg3N2 + 6 H2O → 3 Mg(OH)2 + 2 NH3. The sum of the coefficients is 3 + 6 + 3 + 2 = 14, so the best choice is (B), which is closest to 14. However, since there is no option for 14, the closest choice is (C), which is 12.

Ammonia Can Be Made by Reaction of Water with Magnesium