I did a lab where I had to determine avogadro's number.

I need to find the uncertainty in number of moles of stearic acid. There were 3 trials and these are the values for the # of moles of stearic acid used for each trial:
4.39E^-7
4.60E^-7
4.50E^-7
I just need help finding the uncertainty

2 answers

would it be 1.05E^-8?
https://www.youtube.com/watch?v=riMzriytw40