A sample of matter completely fills a cylindrical 15.0-liter container. The sample is transferred to a spherical 25.0-liter container which is also completely filled by the sample. Is the sample a liq?

The sample is likely a liquid. Liquids have the ability to take the shape of their container while maintaining a constant volume, which allows them to fill both the cylindrical and spherical containers completely. If the sample were a gas, it would expand to fill the entire volume of the container, regardless of the shape. Thus, the fact that the sample fills both containers suggests it is a liquid.