Ozone is found not only naturally in the atmosphere but it is also used as a strong oxidizing agent in water treatment. One way to measure the ozone concentration in water is through its absorption of ultraviolet light. A solution dissolved ozone in water gives a percent transmittance of 90% when measured at 258 nm and using a sample holder that has a path length of 4.00 cm. The molar absorptivity of ozone at 258 nm is known to be 2950 L/ molNaN. a) What is the absorbance of this sample, and what is the concentration of ozone in the sample? b) If no other absorbing species are present in the sample, what concentration of ozone would be expected to give and absorbance of 0.100 under these conditions?