4 P + 5 O₂ → 2 P₂O₅
Explanation:
To balance the equation the number of atoms of each element entering the reaction have to be equal to the number of atoms of each element leaving the reaction, in order to conserve the mass.
2 P + (5/2) O₂ → P₂O₅
To have integer stoechiometric coefficients we multiply the reaction with 2 to get:
4 P + 5 O₂ → 2 P₂O₅
Learn more about:
balancing chemical equations
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