Answer:
4.34%
Step-by-step explanation:
The accepted value for the density of rubber is 1.15 g/mL
Let the calculated value for the density of rubber is 1.2 g/mL
We need to find the percent error for rubber stopper. It can be calculated as follows :
![\text{Error}=\frac{|\text{actual value-calculated value}|}{\text{actual value}}* 100\\\\\text{Error}=(1.15-1.2)/(1.15)* 100\\\\\text{Error}=4.34\%](https://img.qammunity.org/2021/formulas/chemistry/high-school/qryv6kr9jan1ntuidmh88s2xhjhqyus753.png)
So, the percent error for the density of rubber is 4.34%.