Question

A sample of carbon tetrachloride, a liquid once used in dry cleansing, has a mass of 39.73 grams and a volume of 25.0mL at 25°C. What is its density at this temperature? Will carbon tetrachloride float on water?

Answer 1

$$\rho = {m \over V}$$

$$\rho = {39.73 g \over 25.00mL} = 1.5916 g/mL \approx 1.59 g/mL$$

Assuming a water density of about 1 g/mL carbon tetrachloride will be located UNDER the water layer, as its density is higher.

Answer: 1.59 g/mL; no, it will not float on water, but will be located under a layer of water.