The exactly answer is Gases neither have definite volume no one definite shape.
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Gases have actually neither definite shape nor definite volume due to the fact that the molecules of gas are an extremely far apart compared with the molecule of heavy or liquid.
Additional InformationParticles are much apart from every other since there are an extremely weak forces of attraction between them.They move fast in all directions. Because of this, gases don't have a definite shape or volume and fill any kind of container.Because there is too many of free space in between particles, gases can conveniently be compressed.Gases are fluid and also flow easily.Gases diffusive (mix and spread out) and also effuse (travel through tiny holes).
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