give the Rf values of iron and copper
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Explanation:
The Rf value of a compound is equal to the distance traveled by the compound divided by the distance traveled by the solvent front (both measured from the origin).
The fastest moving spot has the highest Rf value. polar (fastest moving), and the spot with the lowest Rf value is the most polar (slowest moving). Rf values are frequently used to compare a known and an unknown substance to determine if they are the same.
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