Question

The density of a substance of mass 5.318 g which occupies a volume of 2.43 cm³ is (up to correct significant figures):

• A. 2.188 g/cm³
• B. 2.180 g/cm³
• C. 2.19 g/cm³
• D. 2.18 g/cm³

Hint:

When performing calculations, always round off the final result based on significant figures.

Answer 1

The Correct Option is C

Step 1: Formula for Density

\[ \text{Density} = \frac{\text{Mass}}{\text{Volume}} \] \[ = \frac{5.318 \text{ g}}{2.43 \text{ cm}^3} \]
Step 2: Calculating Density

\[ = 2.188 \text{ g/cm}^3 \] Rounding to three significant figures: \[ \mathbf{2.19 \text{ g/cm}^3} \]
Step 3: Conclusion

Since 2.19 g/cm³ is the correctly rounded value, Option (3) is correct.