To find the volume of cyclohexane needed, we can use the formula for density:
Rearranging this formula to solve for volume gives:
We are given:
- Mass of cyclohexane = 13.0 g
- Density of cyclohexane = 0.7781 g/mL
Now, we can calculate the volume:
Now, rounding to three significant figures, the volume of cyclohexane that should be used is: