Calculating Percent Error. What is it??. Percent Error is used to determine the inaccuracy, in percentage, of a measured or estimated value, compared to an accepted value. The Components of the Formula.
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Calculating Percent Error
Percent Error is used to determine the inaccuracy, in percentage, of a measured or estimated value, compared to an accepted value.
EV= Estimated Value (measured value!)
AV= Actual Value
PS. We multiply by 100 to make to make the decimal a percent.
X 100 = Percent Error
(22.7-21.8) X 100 = PE
.900 X 100 = PE
.0413 X 100 = PE
4.13 % = PE
(.235 - .135) X 100 =PE
.100 X 100 = PE
.741 X 100 = PE
74.1 % = PE
2. An experiment was conducted to find the mass of one mole of carbon atoms. The results of the experiment showed that a mole of carbon atoms had a mass of 15.78 g. The accepted value of a mole of carbon atoms is 16.00 grams. What is the percent error in this experiment?
3. An experiment performed to determine the density of lead yields a value of 10.95 g/cm3. The accepted value for the density of lead is 11.342 g/cm3. Find the percent error.
4. Find the percent error in a measurement of the boiling point of bromine if the laboratory figure is 40.6°C and the accepted value is 59.35°C.
answer 31.59 %