Question

has a mass of 81 grams. The sample was put into 150 mL of water. After dropping the mineral sample into the water, the volume on the graduated cylinder is 180 mL.what is the volume of the mineral sample? 60mL30mL150mL180mL

Answer 1

In order to calculate the volume of the mineral sample, we can subtract the volume after the addition of the minerals by the volume before dropping the mineral sample.

So we have:

$\begin{gathered} \text{mineral volume}=\text{ after-before} \\ \text{mineral volume}=180-150 \\ \text{mineral volume}=30 \end{gathered}$

So the volume is 30 mL, therefore the correct option is the second one.