The Absorbance of a Solution of the Amino Acid Tryptophan

The absorbance of a solution of the amino acid tryptophan, C₁₁H₁₂N₂O₂, of concentration 1.05 g dm^-3 in a cuvette with a path length of 1.0 cm is 10.29 at a wavelength of 240 nm. Determine the molar absorption coefficient at this wavelength.

A) 5.14 *10³ dm³ mol^-1 cm^-1
B) 52.9*10^-3 dm³ mol^-1 cm^-1
C) 2.00* 10³ dm³ mol^-1 cm^-1
D) 9.8 dm³ mol^-1 cm^-1