You have run a TLC on an unknown DNPH derivative of a ketone. After development, it appeared as shown below. How do you calculate the Rf value? In your equation, use the relevant constants A, B, C, D, and E depicted below.
top of TLC plate (A)
solvent traveled to here (B)
sample traveled to here (C)
sample applied here (D)
bottom of TLC plate (E)