In a chemistry experiment, a student measures the density of iridium (Ir) metal as 21.52 g/cm3. The actual density of Ir metal is 22.65 g/cm3. What is the percent error of the student's measurement?
To find the percent error of the student's measurement, you need to compare the measured value to the actual value and calculate the difference as a percentage.
Step 1: Calculate the difference between the measured value and the actual value.
Measured value = 21.52 g/cm3
Actual value = 22.65 g/cm3
Difference = Actual value - Measured value
= 22.65 g/cm3 - 21.52 g/cm3
= 1.13 g/cm3
Step 2: Divide the difference by the actual value and multiply by 100 to get the percent error.
Percent error = (Difference / Actual value) x 100
= (1.13 g/cm3 / 22.65 g/cm3) x 100
≈ 4.99%
Therefore, the percent error of the student's measurement is approximately 4.99%.