Answer:
[tex]\rm \text{The balanced equation is is $\large \boxed{\text{2Mg + O$_{2} \longrightarrow \,$ 2MgO}}$}[/tex]
Explanation:
Mg + O₂ ⟶ MgO
1. Balance O.
We have 2 atoms of O on the left and 1 O on the right.
Put a 1 in front of O₂ and a 2 in front of MgO.
Mg + 1O₂ ⟶ 2MgO
2. Balance Mg:
We have fixed 2 Mg on the right. We need 2 Mg on the 2 Mg on the left. Put a 2 in front of Mg.
2Mg + 1O₂ ⟶ 2MgO
Every formula now has a coefficient. The equation should be balanced.
3. Check that atoms balance:
[tex]\begin{array}{ccc}\textbf{Atom} & \textbf{On the left} & \textbf{On the right}\\\text{Mg} & 2 &2\\\text{O} & 2 & 2\\\end{array}[/tex]
The equation is now balanced.
[tex]\rm \text{The balanced equation is is $\large \boxed{\textbf{2Mg + O$_{\mathbf{2}} \longrightarrow \, $ 2MgO}}$}[/tex]
