How do molecules travel? PLEASE HELP (SCIENCE HW)?

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I have to write a BCR on how molecules from air freshener travel across a room.
 
gaseous molecules travel in a gaseous medium by diffusion...

this is the movement of molecules as they scatter throughout another (or similar) substance.

if you want to really see how diffusion works, drop water color in a glass of water.. you will actually see how the color "diffuses" through the water and finally scatter after some time. this is the same phenomenon in air.

once another type of gas (such as perfume) is released in one part of the room, the concentration of gas in that part is greater than in any part of the room.. due to the difference in concentration (this is the driving force for diffusion), the molecules of perfume tend to move towards the direction where concentration is lower.. the ultimate goal is to attain equilibrium (in terms of concentration throughout the room)...
 
gaseous molecules travel in a gaseous medium by diffusion...

this is the movement of molecules as they scatter throughout another (or similar) substance.

if you want to really see how diffusion works, drop water color in a glass of water.. you will actually see how the color "diffuses" through the water and finally scatter after some time. this is the same phenomenon in air.

once another type of gas (such as perfume) is released in one part of the room, the concentration of gas in that part is greater than in any part of the room.. due to the difference in concentration (this is the driving force for diffusion), the molecules of perfume tend to move towards the direction where concentration is lower.. the ultimate goal is to attain equilibrium (in terms of concentration throughout the room)...
 
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