To calculate the percent error, we can use the formula:
Percent Error = [(Experimental Value - Accepted Value) / Accepted Value] * 100
In this case, the experimental value is 1.23 g/cm³ and the accepted value is 1.67 g/cm³. Let's plug these values into the formula:
Percent Error = [(1.23 - 1.67) / 1.67] * 100
Percent Error = (-0.44 / 1.67) * 100
Percent Error ≈ -26.35%
The percent error of the density calculation is approximately -26.35%.