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how can percent yield be less than 100. However percent yields greater than 100 are possible if the measured product of the reaction contains impurities that cause its mass to be greater than it actually would be if the product was pure. In such techniques compound gets lost.
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In such techniques compound gets lost. Some precipitate sticks to the walls of the beaker and is extremely difficult to remove. Therefore the possibility of having a percent yield greater than 100 is impossible unless an error is made during the procedure.
Often the percent yield is less than 100 but sometimes a perplexing percent yield of over 100 is obtained.
Further all information provided above is applicable. However percent yields greater than 100 are possible if the measured product of the reaction contains impurities that cause its mass to be greater than it actually would be if the product was pure. Percent yield is simply the actual yield the mass of resultant divided by the theoretical yield the most that can be attained. 405 g 2HgO s -- 2Hg l O2 g In a certain reaction 437g of HgO is decomposed producing 321g of Hg.