Question

2 n₂ + 0 o₂ → 2 n₂o not balanced

Explanation:

Step1: Count N atoms on each side

Left: $2 \times 2 = 4$ N atoms; Right: $2 \times 2 = 4$ N atoms

Step2: Count O atoms on each side

Left: $0 \times 2 = 0$ O atoms; Right: $2 \times 1 = 2$ O atoms

Step3: Balance O atoms first

Add coefficient 1 for $\text{O}_2$: $2\text{N}_2 + 1\text{O}_2
ightarrow 2\text{N}_2\text{O}$
Now left O: $1 \times 2 = 2$, right O: 2 (balanced)

Step4: Recheck N atoms

Left N: 4, right N: 4 (still balanced)

Answer:

The balanced chemical equation is $\boldsymbol{2\text{N}_2 + \text{O}_2 = 2\text{N}_2\text{O}}$