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If two samples have identical Rf values does this mean that they are necessarily identical molecules Explain?
No. The molecules MAY (and probably are if you are presented with this situation in school/college lab courses) be identical but just the Rf values is not enough information to determine, you must conduct additional tests. Two different molecules can have the same Rf value.Compound A will always have an Rf of X in solvent M. Compound B will always have and Rf of Y in solvent M. But, Rf X can be equivalent to Rf Y without compounds A and B being identical.
What kind of coin is RF on front and 10F on back?
This is a 10 Franc ("10F") coin from France ("RF" stands for "Republique Francaise", which is French for the French Republic)
624÷ =62.4?
4.67
How do you calculate for bandwidth power saving in ssbsc?
SSBSC uses 1/2 of the bandwidth and 1/6 as much RF power as AM modulated 100% .
How is math used in MRI?
Inside the 'donut' of the MRI machine are a huge number of RF (radio frequency) sources and RF detectors. After the sources shoot a short, powerful pulse of RF into you, the sources shut off, and the tissues throughout your body "ring", in response to the RF they've absorbed, combined with the powerful field of the giant permanent magnet that's also all around you inside the donut. The detectors listen to the 'ringing' of your body's tissues from a huge number of different directions, all around the ring. Each detector hears a ring of a slightly different level, and hears it fade out after a slightly different time. The signals that are heard by all of the detectors are compared and combined to give a picture of what's inside you. The basic concept of forming the image is the same as in other forms of "tomography" ... the CT scan, using X-rays instead of RF, and the PET scan, using positron emission from a radioactive substance. The math is incredibly complex in each case. On a completely irrelevant note, but one which I can't bring my self to conclude without mentioning ... probably my only claim to fame is the fact that my brother-in-law is one of the names on the original patent granted to GE for the computed tomography process, and his sister was involved in some good-science early MRI research when we met in the late 70s. Those facts and several nickels have bought me many cups of coffee through the years ever since.
Why are Rf values used?
Rf values are used mainly for simplicity. These values are generally easier to use to obtain percentages between a couple objects instead of using values that are already established.
How are Rf values used?
Rf value to compare the "unknown" components of colored candy dyes with the "known" components of food coloring dyes.
What are the Rf values of amino acids?
The Rf (retention factor) values of amino acids can vary based on the specific conditions used in thin layer chromatography. Generally, Rf values for different amino acids will fall within a range of approximately 0.1 to 0.9, with each amino acid having a unique Rf value based on its individual chemical properties. For precise values, it is best to consult specific experimental data or reference sources.
Can 2 substances with different Rf values still be similar?
Yes, two substances with different Rf values can still be similar. Differences in Rf values can be due to various factors, such as the polarity of the compound or the composition of the stationary phase. Therefore, substances with different Rf values can still share similar chemical structures or functional groups.
Why test building materials at different RF values?
Different RF values are used in order to identify components of a mixture. Thin Layer & Column Chromotography is the procedure that is used to prepare and analyze materials, such as those that are used in the chemical manufacturing plants, forensics, and water purification, among other things.
Would RF values of amino acid you use in paper chromatography be the same if you use another solvent system?
No, RF values depend on the specific solvent system used in the chromatography process. Changing the solvent system can alter the interactions between the amino acids and the stationary phase, resulting in different RF values. It is important to optimize the solvent system to achieve accurate and reproducible results.
What are the significance of values?
Rf Values determine the solubility of a substance with respect to a certain solvent.
Arrange the following compounds in order of increasing Rf values in TLC Anthracene benzil tryphenylmethanol?
The order of increasing RF values in TLC is Benzil, methanol anthracene and tryphenyl.
Where you could find the standard Rf values for fatty acids and poly unsaturated fatty acids?
You can typically find standard Rf values for fatty acids and polyunsaturated fatty acids in scientific literature, such as research papers, textbooks on chromatography, or chemical databases like ChemSpider or PubChem. These values may vary depending on the specific method and conditions used for their determination.
How are values used?
Rf value to compare the "unknown" components of colored candy dyes with the "known" components of food coloring dyes.
Why Ni positive 2 and iron positive 3 ions have different Rf values?
Ni2+ and Fe3+ ions have different Rf values because they have different charge-to-size ratios, leading to differences in their interactions with the stationary phase in the chromatography process. The higher charge of Fe3+ compared to Ni2+ results in stronger electrostatic interactions with the stationary phase, causing it to move slower and have a higher Rf value.
What is the significance of Rf value in chromatography?
The Rf value, or retention factor, in chromatography is a measure of how far a compound travels in relation to the solvent front in a chromatogram. It helps in identifying and characterizing compounds based on their movement and separation in the chromatographic system. Comparing Rf values can aid in qualitative analysis, determination of purity, and identification of unknown components within a sample.
