Solution: 72.0 mL of a 1.20 M solution is diluted to a total volume of 278 mL. A 139-mL portion of that solution is diluted by adding 177 mL of water. What is the final concentration? Assume the volumes are additive.

Problem

72.0 mL of a 1.20 M solution is diluted to a total volume of 278 mL. A 139-mL portion of that solution is diluted by adding 177 mL of water. What is the final concentration? Assume the volumes are additive.

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