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~ x + y + z = 3, x² + y² + z² = 5, x³ + y³ + z³ = 7 ➪ x⁴ + y⁴ + z⁴ = ? What about oxidation reaction charge? Is it true that the oxidation number of an ion is equal to its protons subtracting its electrons? Chi mi sa spiegare questa dervata (ln^2x)/x dx? If you started with 3.60g of Copper and reacted it with an excess of nitric acid what mass of copper hydroxide would you expect to recover?