If the formula of a oxide is X2O3, what is the formula of the chloride of X?
(A) XCl3 (B) XCl (C) X3Cl (D) XCl6

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  1. The formula is X2O3 for the oxide. Since oxygen has a valence of -2, then X must have a valence of +3. Cl has a valence of -1; therefore, the formula for the chloride will be XCl3.

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  2. basically the atom in x of nektonic substance must mean x is equal to the 9th o f your overall answer so your answer is 69

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