Question

calculate the density of an object, if the mass is 183 g and the volume is 21 ml.
density = \frac{mass}{volume}
remember to select an answer with the correct number of significant figures.

Explanation:

Step1: Identify the formula

The formula for density is $
ho=\frac{m}{V}$, where $
ho$ is density, $m$ is mass and $V$ is volume.

Step2: Substitute values

Given $m = 183$ g and $V=21$ mL. Substitute into the formula: $
ho=\frac{183}{21}$.

Step3: Calculate density

$\frac{183}{21}\approx8.714$ g/mL.

Step4: Consider significant - figures

The mass 183 has 3 significant - figures and the volume 21 has 2 significant - figures. When dividing, the result should be reported with 2 significant - figures. So, $
ho\approx8.7$ g/mL.

Answer:

8.7 g/mL