Calculate the rf value for the reactant b spot. estimate the ruler to the nearest tenth, report the answer using two significant figures.

1. Measure the distance the solvent front traveled from the baseline (m1). 2. Measure the distance the reactant b spot traveled (the center of the spot) (m2). 3. To determine the rf, divide (m2/m1). 4. Significant figures - use 2 so the answer should be written to the hundredths place as the spot will not travel farther than the solvent front.