Answer:
400 cm³
Explanation:
You want to know the volume of a 100 g sample of foam with a density of 0.25 g/cm³.
Volume
The relation between volume, mass, and density is ...
density = mass/volume
Solving for volume gives ...
volume = mass/density
Application
Using the given values, we find the volume of the foam to be ...
volume = (100 g)/(0.25 g/cm³) = 400 cm³
The volume of the foam is 400 cm³.