Balance the following equations step by step
1. magnesium reacts with oxygen and forms magnesium and carbon monoxide.
2. Phosphorus reacts with oxygen to forms phosphorus pantoxide.

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Solution

The first equation is magnesium reaction with oxygen to form magnesium oxide
Mg + O₂ ----> MgO
Balance the oxygen of right hand side
Mg+O₂ ---> 2 MgO
Now balance the magnesium by putting 2 before magnesium in the LHS side.
2 Mg + O₂ ----> 2 MgO

The second equation is
P₄ + O₂ ----> P₂O₅
Now balance the P in the RHS
P₄ + O₂ ----> 2P₂O₅
Now balance the Oxygen in the LHS
P₄ + 5O₂ ----> 2 P₂O₅

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