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why is the rate of diffusion faster in gases.

Because in gase inter-particle force of attraction is almost negligible and so gases move freely and its particles mixes with its environment quickly.

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The rate of diffusion is directly proportional to the kinetic energy of the particles of the diffusing object .The kinetic energy of the particles of gases is very high so rate of diffusion in gases is higher.

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There is more space in gases. As a result, there are less collisions between the molecules causing a faster diffusion rate. Other factors that may have an affect on diffusion rates are temperature, mass of the molecule, volume/surface area, and medium used.

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in what ways air can be considered as matter

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air occupies space and hence is a matter

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Anything that occupies space is called matter. gases th e particles have less force of attraction resulting in faster diffusion.Air can called matter by one more reason that is it can be known by sense organs

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yes its correct
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göôđ
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gases move freely and the molecules in them move with high energy and they have less inter molecular attraction between them so ie why the rate of diffusion is high in gases is mare thn liquids & solids
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diffusion is faster in gases as the intermolecular force of attraction among the gas molecule is least therefore molecule could move with more ease 
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Diffusion means spreading out and intermixing of particles from one substance to another substances due to movement of particles. ... Rate of diffusion in gases is high because they have large intermolecular space and they posses more kinetic energy than liquids and gases
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