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Which is an empirical formula P₂O₅? How is this determined?
How is that determined?
The empirical formula is determined by finding the smallest whole number ratio of atoms in a compound. In the case of P₂O₅, the ratio of phosphorus to oxygen atoms is 2:5, so we divide both numbers by the greatest common factor, which is 2. This gives us the empirical formula of P₄O₁₀.