Urea diffuses slower than sodium due to its larger molecule size and mass.
The rate of diffusion for urea is slower than that for sodium because urea is a larger molecule.
Heavier molecules move more slowly, making them diffuse more slowly, as stated in the given information. Since urea is a larger molecule compared to sodium, it diffuses at a slower rate due to its mass.
When considering diffusion, the mass of molecules plays a significant role in determining the rate at which they can move through a substance, affecting their diffusion speed.
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