A substance seems to completely fill a container, but more can be forced in. What is the subatance a solid, liquid gas or none of these?
Probably a gas?
To determine whether the substance is a solid, liquid, gas, or none of these, we need to understand the behavior of these states of matter under different conditions.
If the substance completely fills the container but more can be forced in, it means that the substance is compressible. This suggests that the substance is a gas. Gases have particles that are spread out and move freely, allowing them to be easily compressed into a smaller volume.
On the other hand, solids have a fixed shape and volume, and they cannot be compressed significantly. Liquids, while they can flow and change shape, are also incompressible to a great extent.
Therefore, based on the given information, the substance in question is most likely a gas.