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zimovet [89]
3 years ago
13

Describe how to calculate the Rf value for a spot on a TLC plate.

Chemistry
1 answer:
DaniilM [7]3 years ago
4 0

Answer:

In thin-layer chromatography, the retention factor (Rf) is used to compare and help identify compounds. The Rf value of a compound is equal to the distance traveled by the compound divided by the distance traveled by the solvent front (both measured from the origin).

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Displacement reactions occur when a metal from the electrochemical series is mixed with the ions of a metal lower down in the electrochemical series. The atoms of the more reactive metal push their electrons on to ions of the less reactive metal. An example can be seen below.

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Why did Democritus disagree with Aristotle?
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Aristotle rejected Democritus's concept of the atom, as it did not agree with his own ideas on nature!

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Describe a mechanical property of steel that characterizes its resistance to permanent deformation
strojnjashka [21]

The mechanical property of steel that characterizes its resistance to permanent deformation is ductility.

Am alloy is a substance prepared by adding one or more elements to a base or parent metal to obtain desirable properties.

Steel is an alloy of Iron and carbon in the composition of 99.8% and 0.2% respectively.

The mechanical or physical properties of steel include:

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The ductility of a metal like steel is the ability of a metal to change its shape without breaking, that is, resistance to permanent deformation.

Therefore, the mechanical property of steel that characterizes its resistance to permanent deformation is ductility.

Learn more here:

brainly.com/question/21706983

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