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vzapanta
69.0 mL of a 1.20 M solution is diluted to a volume of 218 mL. A 109-mL portion of that solution is diluted using 143 mL of water. What is the final concentration?
mv=mv 1.2*.069=.218*x x is the morality of the solution in the 218ml solution
so then use x*.109=.143y y=your final concentration