February 21, 2017

Homework Help: CHEM, please help!

Posted by Kate on Thursday, February 16, 2012 at 11:07pm.

A 11 mL sample of a solution of AlBr3 was diluted with water to 23 mL. A 15 mL sample of the dilute solution was found to contain 0.045 moles of Br-. What was the concentration of AlBr3 in the original undiluted solution?

answer is 2.09 but i cant get it.

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