1 By convention a normal lens on a 35mm film camera (and thus a full-frame EOS digital SLR) has a focal length of 50mm or so. 2  A lens with a focal length of 35mm is considered ânormalâ for a cropped-frame EF-S camera.
Aspirin. One of the best known aromatic acetates is acetylsalicylic acid, or aspirin, which is prepared by the esterification of the phenolic hydroxyl group of salicylic acid. Aspirin possesses a number of properties that make it the most often recommended drug.
Aspirin is the tradename for acetyl salicylic acid, which is used as an analgesic for minor pain relief, an antipyretic to reduce fever, and a blood anticoagulant. 8 people found this useful. Edit. Functional Groups: Organic Chemistry 101 Functional groups are groups of atoms that are found in molecules, which are involved in the chemical reactions associated with those molecules. 2  Functional groups can be idenâ¦.