Question

While doing a lab, a student found the density of a piece of pure aluminum to be 2.85 g/cm. The accepted value for the density of aluminum is 2.70 g/cm. What was the students percent error?

Answer 1

The student's percent error for the density of aluminum measurement is approximately 5.56%.

Step-by-step explanation:

To calculate the percent error for the density of aluminum measurement, you can use the formula:

Percent Error = (Experimental Value - Accepted Value) / Accepted Value x 100%

Substituting the given experimental value of 2.85 g/cm³ and the accepted value of 2.70 g/cm³ into the formula, you can calculate the percent error as:

(2.85 - 2.70) / 2.70 x 100%

Simplifying the calculation, the percent error is approximately 5.56%.

Answer 2

5.56%. The formula for percent error is: Percent Error = (|Theoretical value - Experimental value| / Theoretical value) x 100. Remember that the percent error is unitless, and to keep significant figures even after calculations.