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I'm having a hard time solving this problem.

I have to find the identity of element X in the following reaction:

[tex]XCl_2~+~Cl_2~-->~XCl_4[/tex]

knowing that 10 grams of [tex]XCl_2[/tex] + 2.55 grams of [tex]Cl_2[/tex] produces 12.55 grams of [tex]XCl_4[/tex].

Now, I thought about doing mass percent composition that way I could know how much Cl there was in relation to the element X but I don't know any way to do that.

I'm stuck. Any ideas?

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# Getting the identity of an unknown element in a reaction.

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