A. a spectrophotometer is known to have 0.800% stray light reach the detector for all analyses due to poor light sealing. determine the true absorbance, apparent absorbance, and apparent transmittance for a sample with a true transmittance of 0.0811.
b. what amount of stray light produces an apparent absorbance of 1.995 with a true transmittance of 0.0100?
c. in the process of performing an analysis, you determine that you need to improve the precision by limiting the error in the absorbance to 0.7200. you attempt to achieve this by reducing the amount of stray light that reaches the detector. what is the maximum amount of stray light that can reach the detector that will limit the error in the absorbance to 0.7200 for a true absorbance of 1.1?

Salicylic acid is a very important acid. it is used to synthesize the aspirin by treating with acetic anhydride. a 0.2015-g sample of salicylic acid was dissolved in a 100.00-ml volumetric flask, and the solution was diluted to the mark. a 10-ml aliquot of this solution was titrated with standard naoh (0.01130 + 0.2% n) to a phenolphthalein faint pink color end point at 19.81 ml. (a) (calculate the normality of the salicylic acid solution used in the titration. (b) assuming the salicylic acid is pure, what is the equivalent weight of the salicylic acid? practice problems for the final exam (continued) (c) (calculate the inherent error in the determination of the equivalent weight you calculated in part (b). use the following absolute errors in the equipment /glassware when calculating the inherent error. 5.00-ml pipet: + 0.02 ml 100-ml volumetric flask: + 0.08 ml analytical balance: + 0.2 mg 25-ml buret: + 0.03 ml

Miner's coal distributors does not mine coal itself, nor does it even store or handle the coal. instead, miner's solicits orders for low sulfur coal from other firms, then purchases the required amount from suppliers and directs them to ship the coal to its customers. what is miner's

Asolid that forms and separates from a liquid mixture is called