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    • #11246
      sophi3nutt
      Participant

      I have a graph of absorbance against concentrations of BCG dye at 614 nm.
      I have been asked to estimate the molar extinction coefficient for BCG from the graph and show how my value was calculated. The Molecular weight values for BCG is 698.

      I simply do not know where to start!
      So far:
      E=A/c
      I have an absorbance of 0.406/0.35 = 1.16 L.mol-1.cm-1…but do not know what to do regarding the molecular weight.

    • #90266
      alexandertg6
      Participant

      nothing. ignore it. A=EbC where E is molar extinction coefficient, b is the path of light in cm, and C is concentration

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