Question

What is the volume of 15.0 gr of ethanol if the density is 0.78 g/mL

Answer 1

Answer: the volume of this ethanol sample is 19.2 mL

Explanation:

The question requires us to determine the volume of a 15.0g sample of ethanol, given its density (0.78 g/mL).

Measurements > Density

The density of a substance is defined as the ratio between its mass and volume:

$density=\frac{mass}{volume}$

We can rearrange the equation above to calculate the volume given the mass of a sample and the density of the substance:

$volume=\frac{mass}{density}$

And, applying the values of mass and density given by the question, we'll have:

$volume=\frac{15.0g}{0.78g/mL}=19.2mL$

Therefore, the volume of this ethanol sample is 19.2 mL.