Astudent spots an unknown sample on a tlc plate. after developing the plate in a 50: 50 mixture of hexane/ethyl acetate, the student sees a single spot with an rf of 0.40. does this indicate the unknown sample is a pure compound? what else could the student do to verify whether the sample is pure or a mixture?
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Chemistry, 22.06.2019 19:10
How does the atmosphere to make earth livable? check all that apply. causes the seasons contains oxygen provides warmth creates important nutrients blocks harmful energy from the sun plz like !
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Chemistry, 22.06.2019 20:00
Suppose that some of the compound spilled out of the crucible after it was heated. would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? briefly explain your answer.
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Chemistry, 22.06.2019 22:30
Which process describes vaporization that takes place below the surface of a liquid? condensation melting boiling evaporation
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Astudent spots an unknown sample on a tlc plate. after developing the plate in a 50: 50 mixture of h...
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