An experiment requires 13.0 g of cyclohexane, which has a density of 0.7781 g/mL at 25° C. What volume of cyclohexane should be used?

Question

Express your answer using three significant figures.

Answer 1

To find the volume of cyclohexane needed, we can use the formula for density:

\[ \text{Density} = \frac{\text{Mass}}{\text{Volume}} \]

Rearranging this formula to solve for volume gives:

\[ \text{Volume} = \frac{\text{Mass}}{\text{Density}} \]

We are given:

• Mass of cyclohexane = 13.0 g
• Density of cyclohexane = 0.7781 g/mL

Now, we can calculate the volume:

\[ \text{Volume} = \frac{13.0 , \text{g}}{0.7781 , \text{g/mL}} \approx 16.7 , \text{mL} \]

Now, rounding to three significant figures, the volume of cyclohexane that should be used is:

\[ \boxed{16.7 , \text{mL}} \]