Question

A student uses magnesium for their experiment. If their data indicated the atomic mass of magnesium was 26.6 instead of the 24.30 on the periodic table, what is their percent error? Answer should be rounded using correct sig fig rules.

THE ANSWER I GOT WAS 9.47 PERCENT
AM I RIGHT?

Answer 1

Percent Error = (|experimental value - actual value| / actual value) x 100%

Plugging in the values, we get:

Percent Error = (|26.6 - 24.30| / 24.30) x 100% = 0.0947 x 100% = 9.47%

However, as per the rules of significant figures, the final answer should be rounded to 2 significant figures, so the answer would be 9.5%.