It expands to fill the container.
liquid because the yellow substance takes the form of the container.
In the gas phase, molecules will evenly fill the size of the container they are placed in. This is because gas molecules have high kinetic energy and are in constant motion, spreading out to fill the available space.
I'm not sure what substance has that density, but what i can tell you is that the substance your looking for is a gas.
Gas not liquid because you may have too much liquid
The volume of a gas does not depend on its mass. The volume of a gas is determined by factors such as temperature and pressure according to the ideal gas law, while the mass of a gas is a measure of the amount of substance present.
If the substance takes the shape of its container, has no definite volume, and can be easily compressed, it is likely a gas. Additionally, gases typically exert pressure on the walls of their container and expand to fill the available space.
This would be a gas. A gas expands to fill the space of the container that contains it.
A gas can expand to fill the entire volume of its container because the particles are not confined and can move freely. When a gas is placed in a container, it will fill the entire space available to it.
liquid because the yellow substance takes the form of the container.
This is a gas, due to it not actually having a definite volume.
Gas
Gas completely fills its container, liquid stays as a unit and fills the container with respect to gravity, and solids do not fill their containers
A gas is any substance that forms into the shape of its container (bottle, room, etc.) and completely fills said container fully and evenly. Source: university chemistry
The substance is likely a gas, such as air, which can be compressed to fit more into the container when pressure is applied. This property is a characteristic of gases, as their particles are more spread out and can be compressed together.
you can't see gases and it fills the room/container.
A bottle.
A substance that is not a solid or gas, takes the shape of its container, has definite volume, but no definite shape.