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CO₂ : C⁺⁴ y O⁻²
K₂O: K⁺¹ y O⁻²
Cl₂O₅ : Cl⁺⁵ y O⁻⁵
HNO₃ : H⁺¹ , N⁺⁵ y O⁻²
H₂S : H⁻¹ y S⁺²
Mg(OH)₂ : Mg⁺² y (OH)⁻¹
CaSO₄ : Ca⁺² , S⁺⁶ O⁻²