how to find molar absorptivity in beer s law

How to find molar absorptivity in Beer’s law? Only absorbance, length is known. Need to find molarity too. Based on experiment where we used a spectrophotometer to find absorbance of Cu 2+. wavelength was 620nm. length is one.

Absorbance

0

0.574

0464

0.350

0.114

 
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