Write balanced chemical equations for these equations :
Magnesium ribbon is burnt in a jar containing nitrogen gas when a white powder of magnesium nitride is obtained.

Explanation

To write the balanced chemical equation for the reaction where magnesium ribbon is burnt in a jar containing nitrogen gas to form magnesium nitride, follow these steps:

### Step 1: Write the unbalanced chemical equation
The reactants are magnesium (Mg) and nitrogen gas (N₂), and the product is magnesium nitride (Mg₃N₂). Thus, the unbalanced equation is:
\[ \text{Mg} + \text{N}_2 \rightarrow \text{Mg}_3\text{N}_2 \]

### Step 2: Identify the number of atoms of each element
- On the reactant side:
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