Question

An irregularly shaped stone was lowered into a graduated cylinder holding a volume of water equal to 20L. The height of water rose to 30.2mL. If the mass of the stone was 25g what was its density?

Answer 1

Answer:

2.45 g/mL

Explanation:

(assuming that the original volume was 20 mL and not L)

Since you know the amount of water in the cylinder before and after you placed the rock in, you can subtract them to get the volume of the rock itself. $30.2-20=10.2$ mL.

To get the rock's density, use the equation $d=\frac{m}{v}$, where m is mass and v is volume.

$d=\frac{25 g}{10.2mL}\\\\d=2.45 g/mL$