Explain how the appearance of the chromatogram might change if the chromatographic paper were initiallywet with water or had come in contact with the skin

Our hands have oils that will change the polarities of the substances when doing the chromatography. Since the purpose of chromatography is to separate the compounds in a mixture we would end up with altered results. The same goes for getting the paper wet.

The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey