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Paper chromatography can separate the components of a mixture of colored dyes because the components have differences in decay mode thermal conductivity

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The answer is: molecular polarity.

Paper chromatography is an analytical method used to separate colored substances.

Substances are distributed between a stationary phase and a mobile phase.

Substances have different chemical structures and because of that, the different polarity, so each molecule have a different solubility in the solvent.

If a substance is very nonpolar, it will not dissolve at all in a very polar solvent.

If water (polar substance) is a solvent, the more polar the color, the higher it will rise on the papers.

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