Which products are formed during the decomposition of magnesium nitride (Mg3N2) ?

A. Mg + 3N2

B. 3Mg + 2N2

C. Mg + 3N

D. 3Mg + N2

E. 2Mg + 3N

The product that are formed during the decomposition of magnesium nitride is 3Mg + N2 (answer D)

Explanation

magnesium nitride decompose to form magnesium and nitrogen according to equation below.

Mg3N2 → 3Mg + N2

According to reaction above 1 mole of Mg3N2 decomposes to form 3 moles of Mg and 1 moles of N2

Decomposition reactions involve the breaking down of compounds to form smaller molecules or elements.

Thus, magnesium nitride will decompose to form elemental magnesium and nitrogen gas

Mg₃N₂ → Mg + N₂

The reaction now needs to be balanced, such that the number of Mg and N atoms in the reactants is equal to that of the products.

Balanced reaction:

Mg₃N₂ → 3Mg + N₂

Ans (D)