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A 150.0-mL sample of Solution A is diluted to a total volume of 423 mL to form Solution B. If the concentration of Solution A was originally 20.0 mg/L, what is the concentration (in mg/L) of Solution B?

  • chemistry -

    20.0 mg/L A x (150.0/423) = concn B in mg/L.
    Or you can use the dilution formula which is
    mL1 x M1 = mL2 x M2.

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