Final answer:
Factors affecting diffusion rate: molecular size, temperature, and solution density.
Explanation:
Molecular size: Larger molecules move more slowly than smaller molecules during diffusion due to the increased difficulty in passing through spaces between molecules.
Temperature: Higher temperatures increase molecular energy, leading to faster movement and higher rates of diffusion.
Solution density: A denser solution slows down diffusion as molecules struggle to move through the medium, while less dense solutions facilitate faster diffusion.
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