Chemistry related question

Question

Why is the equation incorrect?

Mg3 + N2 -> Mg3N2

(A) Some of the subscripts are incorrectly used.

(B) The equation is not balanced.

(C) The valence of the nitride ion is incorrect.

(D) The valance of the magnesium ion is incorrect.

(E) The coefficient of N is incorrect.

Answer 1

Assuming the equation in question is

Mg₃ + N₂ ==> Mg₃N₂

(A) Some of the subscripts are incorrectly used. You can't have Mg₃ as magnesium is a monoatomic element and is represented as Mg.

The correctly balanced equation for the reaction of magnesium (Mg) and nitrogen (N2) is ...

3Mg + N₂ ==> Mg₃N₂