## anonymous 4 years ago A 10.0g sample of XCl2 reacts with a sufficient amount of Cl2 to convert all of the XCl2 into 12.55g of XCl4. What is the atomic weight of X?

1. anonymous

$X+2(Cl)=10.0g$$X+4(Cl)=12.55g$Now let's just use elimination to combine these two equations...$-2X-4(Cl)=-20.0g$$X+4(Cl)=12.55g$$-X=-7.5g \rightarrow X=7.5g$Therefore, the atomic weight of X is 7.5g.

2. anonymous

Thanks, that makes sense