Problem: An element X forms an iodide (XI3) and a chloride (XCl3). The iodide is quantitatively converted to the chloride when it is heated in a stream of chlorine: 2 XI3 + 3Cl2 → 2XCl3 + 3 I2. If 0.5500 g of XI3 is treated, 0.2596 g of XCl3 is obtained. Identify the element X.

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Balanced Reaction:  2 XI3 + 3Cl2 → 2XCl3 + 3 I2

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An element X forms an iodide (XI3) and a chloride (XCl3). The iodide is quantitatively converted to the chloride when it is heated in a stream of chlorine: 2 XI3 + 3Cl2 → 2XCl3 + 3 I2. If 0.5500 g of XI3 is treated, 0.2596 g of XCl3 is obtained. Identify the element X.

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