Measuring instantaneous rates is the most direct way of determining the rate law of a reaction, but it is not always convenient, and it may not be possible to do so with precision.
piece (pÄs) n. 1. A thing considered as a unit or an element of a larger thing, quantity, or class; a portion: a piece of string. 2. A portion or part that has been separated from a whole: a piece of pie. 3. An object that is one member of a group or class: a piece of furniture.
Continue reading... (Ã¤râ²tÄ­-kÉl) n. 1. An individual thing or element of a class; a particular object or item: an article of clothing; articles of food. 2. A particular section or item of a series in a written document, as in a contract, constitution, or treaty.