This is what I wrote for the answer to this question, but I

This is what I wrote for the answer to this question, but I would like to know if it’s correct.
  Consider the solvent mixture of 95:5 Hex:EtOAc used for elution. How would your Rf values differ if you used 100% Hexane as your elution solvent? Why does EtOAc need to be added?
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