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November 21, 2014

Homework Help: AP Chem

Posted by Anna on Monday, January 12, 2009 at 7:42pm.

In a typical synthesis reaction, 0.142 g of chlorine gas is reacted with an unkown elemnt X to form a compound with the formula XCl3. If the final product has a mass of 0.178 g, what is the atomic mass of the unknown element?

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