Calculating Radionuclide (243 Am3+) in a solution

[basicwolves]

Homework Statement

There is an UV-Visible experiment on 243Am3+ in 1 M HClO4 with a 1 cm path length
cuvette and a total volume of 2.5 mL. The absorbance near 500 nm is 0.35. What is the solution concentration of Am

Homework Equations

A = ebC

A = absorbance
b = path length
C = concentration
e = molar absorptivity

The attempt at a solution
I first calculated the molar absorptivity using the absorbance, concentration of 1M HCLO4 and the path length and right off the bat, I knew that this method is wrong (e=0.35, same as the abs reading). I then use the A=ebC equation, but then again this method is wrong because it gave me the same concentration of Am to the concentration of HCLO4. Please help guiding me through this problem.

 

[Borek]

There is not enough information to solve the problem as stated.