Gasses contain highly energetic particles which tend to spread out to fill the room/ container they are in. Often when a smell rises, there is a high concentration of gas molecules in the rising smell. Here diffusion occurs where the molecules spread out randomly moving from an area of high concentration of gas molecules to areas of low gas molecules.
The answer is degree of ionization. I'm guessing you have already taken the quiz.
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Solution:
By the following ways the polar molecule doesn’t mix with non-polar molecule
Polar molecules have a portion of their molecule which, relative to the rest of the molecule, is more negative.
Water, for example, has a bent, or V-shape, due to the 2 lone electron pairs on oxygen. This makes the oxygen end more negative than the hydrogen end. This negative area allows for hydrogen bonding between that molecule and other molecules which are also polar.
Non-polar molecules don't have a portion of the molecule which is more negative than the rest. An example of this is a hydrocarbon, like butane. Because there is no relatively negative region to the molecule, it cannot partake in hydrogen bonding and therefore does not mix with polar molecules.
Thus we can conclude that Polar mixes with polar; non-polar mixes with non-polar.