Can the volume of a gas be measured? yes, just the measure the volume of the container it is in. no, the volume will always be different so it is inaccurate. no, gas is soluble in liquid so it cannot be determined. yes, the volume can be calculated once the mass is determined.

Yes, just the measure the volume of the container it is in.

Explanation:

Solid state : It is a state in which the particles are closely packed and does not have any space between them.This state has a definite shape and volume.

Liquid state : It is a state in which the particles are present in random and irregular pattern. The particles are closely arranged but they can move from one place to another. This state has a definite volume but does not have a fixed shape.

Gaseous state : It is a state in which the particles are loosely arranged and have a lot of space between them.This state has indefinite volume as well as shape. They occupy whole of the container in which they are put.

Thus the the volume of a gas can be measured by measuring the volume of the container it is in.

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.