3 years ago

. Why do you use a pencil and not a pen to mark TLC plates?

1 answer:

7 0

Answer:

Pencil is always used to mark chromatography paper or TLC plates because ink may run and interfere with the chromatogram. ... As soon as the paper/plate is taken out, mark the solvent front with a pencil before the solvent evaporates and the front becomes impossible to see.

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2 reasons for chemical reactivity of nitrogen

erma4kov [3.2K]

Answer:

Due to presence of a triple bond between the two N−atoms, the bond dissociation enthalpy (941.4 kJ mol

−1

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3 years ago

Compare and contrast the use of U-238 and C-14 in absolute age dating

Talja [164]

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