Question

The exact value for the density of aluminum is 2.699g/cm3 . Working in the science lab at school , Joseph finds the density of a piece of aluminum to be 2.75 g/cm3 . what is Joseph percent error?(Round to the nearest hundredths)

Answer 1

The formula for percent error is: (M-A)/A x 100
M= the amount of the sample measured
A= the exact value of the sample
And the value of M-A is always positive
So, 2.75-2.699= .051g/cm3, and .051/2.699=.01889
.01889 x 100=1.889% or 1.9% error