Question

A student calculates the density of iron as 6.80 g/cm3 using lab data for mass and volume. a handbook reveals that the correct value is 7.86 g/cm3.what is the percent error?

Answer 1

% error = (actual value - calculated value) / actual value x 100% hence % error = (7.89 - 6.80) / 7.89 x 100% = 13.8% (to 3 significant figures)