To calculate the volume percent of dioxane we will apply the following formula:
[tex]Volumepercent=\frac{\text{Volume of solute}}{Volume\text{ of solution}}\times100[/tex]In this case, the solute will be dioxane, and the volume will be 69.3 mL.
To calculate the volume of solution we will sum both volumes:
Volume of solution = Volume of dioxane + Volume of Toluene
Volume of solution = 69.3 mL + 1300 mL
Volume of solution = 1369.3 mL
[tex]Volumepercent=\frac{\text{6}9.3\text{ mL}}{1369.3\text{ mL}}\times100\text{ = 5.1}[/tex]We are given all the data with a significant digit, therefore we must report the result also with a significant digit. So the answer will be.
The volume percent of dioxane in the solution is 5.1 %(v/v)