A column is packed with silica gel, which is polar. When a mixture of benzene and acetonitrile mixture is loaded into the column and the column is run with hexane, two bands are observed. Which substance is in the lower band? Explain.

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The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .

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As cooking food that has to go in the oven