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.
chip noun [C] (PIECE). âº a âsmall âpiece of something or a âpiece that has âbroken off a âlarger âobject: âchocolate chips âwood chips Chips of âpaint from the âpeeling âceiling âlittered the âfloor. âº A chip is also the âmark âleft on an âobject where a âsmall âpiece has âbroken off.