Suppose you have a mixture of the three pictured compounds, phenacetin, acetaminophen and aspirin. A TLC plate showed three spots with Rf values of 0.1, 0.2, and 0.3 in 9:1 hexanes:ethanol. Which compound would have the highest, middle and lowest spot respectively? Provide reasoning for your answer.

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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