Biphenyl will have a higher R value than the Methyl Orange.
Explanation:
Biphenyl is a aromatic hydrocarbon and it is a nonpolar molecule.
Methyl Orange is a organic compound with a -SO₃⁻Na⁺ polar functional group which will induce a high polarity in the compound.
You may find the chemical structures of both molecules in the attached picture.
Column chromatography, which use as stationary phase silica gel, is a good technique for separation of the Methyl Orange from Biphenyl.
Being a non-polar molecule, Biphenyl will have a higher R value than the Methyl Orange.
To separate them you use a appropriate solvent as eluent, as exemple chloroform, and Biphenyl will elute first from the column and after that, as a separate phase, Methyl Orange will elute thus separating them.
Learn more about:
chromatography
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Answer:
45) the answer is C.
46) The calculation of quantities in chemical reaction is called Stoichiometry
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47) The phase changed from solid to gas so I think the answer is A.
48) The phase changed from solid to gas as well so I think that the answer is A again.
49) Applying the formula n = m/M, we have n = 1.5 moles, therefore the answer is D.
50) C2H4 + 3O2 -> 2H2O + 2CO2
The answer is C.
51) The answer is C.
52) 2NaHCO3 + CaCl2 -> CaCO3 + H2O + 2NaCl + CO2
Hopefully I got all of them correct.
I'm pretty sure it's B. That's Platinum, by the way.