Beer's law: A = cl
Since absorbance is directly related to concentration, the absorbance doubles on doubling concentration.
Now, A = 2*0.85 = 1.7
Now, A = -Log(T)
i.e. T = 10-A = 10-1.7 = 0.02
Therefore, the percent transmittance of the solution (%T) = 0.02*100 = 2%
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