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# Yield (chemistry)

In chemistry, yield, also referred to as chemical yield and reaction yield, is the amount of product obtained in a chemical reaction.[1] The absolute yield can be given as the weight in grams or in moles (molar yield). The fractional yield or relative yield, which serve to measure the effectiveness of a synthetic procedure, is calculated by dividing the amount of the obtained product in moles by the theoretical yield in moles:

$\mbox{fractional yield} = \frac{\mbox{actual yield}}{\mbox{theoretical yield}}$