No, because the distance a compound moved in relation to the solvent front is relative. The higher up the solvent front the greater the distance travelled by the compound. Remembering that Rf is always <1.
Double-spotting chromatography paper helps ensure that the substance being analyzed is evenly distributed across the paper to enhance separation and analysis. It can also be used as a reference spot to track the movement of the solvent front during the chromatography process.
You leave Crest White Strips on for 30 minutes for twice a day.
no
Yes.
Depending on what colour the hair dye. Your hair will change colour twice
Yep
change or changes They change their clothes everyday. He changes his clothes twice a week.
No, it is not.
twice a year
he shot biggie twice
Not directly, you'll have to change twice.