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A 39.0 mL sample of 1.15 M KBr and a 57.0 mL sample of 0.700 M...

A 39.0 mL sample of 1.15 M KBr and a 57.0 mL sample of 0.700 M KBr are mixed. The solution is then heated to evaporate water until the total volume is 75.0 mL.  What is the molarity of the KBr in the final solution?

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