a student determined in the laboratory that the percent by mass of water in cus04 5h20 is 38.0% if the accepted value is 40% what is the percent of error
percent error is [(abs(experimental - actual))/(actual)] * 100 (38.0 - 40.0 ) / 40.0 = 2.0 / 40 = 0.05 0.05 * 100 = 5 since there are 2 sigfigs, the answer is 5.0 %
I made the 2 positive since the absolute value of 38.0 - 40.0 was taken There are only 2 sigfigs because of the subtraction of 38.0 - 40.0 gives 2.0, only 2 sigfigs
