How to do error propagation for your IA (Internal Assessment)

Measurements (initial 18.22 mL +/- 0.01; final 32.09 +/- 0.01; 0.0025 M +/- 0.0001 S2O32-) answer can be found further below at the end
This is one method of doing error propagation for a IB Chemistry HL internal assessment.
Assign error values to all measurements you make.
When adding/subtracting measurements combine the errors.
When multiplying or dividing, find the percentage the error is of the measurement, then combine the percentages and apply to the final answer.
You must adhere to significant figure rules as well.
The final amount of oxygen would be:
0.2774 mg +/- 0.0115 which would round to 0.28 +/- 0.01

[@artloverrarts]

thanks soooooo much

[@myronlandrum3318]

Very helpful and informative!

[@user-hb4de1jn6d]

Please can you put translation into arabic i love chemistry so much and i need benefit your information ❤