What causes percentage errors?

Answer 1

you'll find that your percent yield should be close to 100%( might be a bit less or more. it is almost impossible to get a percent yield of 100%) . factors that might cause percentage errors generally include slightly different measurements of the reactants (during the experiment. for example an experiment might have called for 150 ml of acetic acid and what you measured might have been a bit off or a little too much!). hope this helped :)