Element X forms both a dichloride (XCl2) and a
Chapter 3, Problem 3.131(choose chapter or problem)
Element X forms both a dichloride (XCl2) and a tetrachloride (XCl4). Treatment of 10.00 g of XCl2 with excess chlorine forms 12.55 g of XCl4. Calculate the atomic weight (mass) of X and identify X.
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