Answer:
0.51 %
Explanation:
Calculated value of the amount of oxygen is 3.9 g
Theoretical value of amount of oxygen is 3.92 g
We need to find the percent error in this experiment. It is given by the difference in theoretical and Calculated value divided by theoretical and multiplying it by 100. So,
[tex]E=\dfrac{3.92-3.9}{3.92}\times 100\\\\E=0.51\%[/tex]
So, the percentage error is 0.51 %.