Question

What causes gas molecules to spread through air?

Answer 1

Gas particles move very quickly (air particles move at 500 m/s on average at room temperature). However, a smell does not travel this fast. This is because itsparticles collide with each other and withparticles of air very frequently. ... Their random motion because of collisions is called Brownian motion .

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Answer 2

Gas particles move very quickly (air particles move at 500 m/s on average at room temperature). However, a smell does not travel this fast. This is because its particles collide with each other and with particles of air very frequently. ... Their random motion because of collisions is called Brownian motion .