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4 years ago

Solvents at disposal:

Chemistry

1 answer:

jeka944 years ago

8 0

<h2>The Best-used Solvent is Hexane.</h2>

Explanation:

In the given solvents -

Hexanes, Toulene, and dichloromethane have lesser eluting power.
Diethyl ether and Ethyl acetate have medium eluting power.
Methanol, water, and acetic acid have very little eluting power.
Greater is the eluting power of the solvent lesser is the amount to be added.
For solvents like Diethyl ether and Ethyl acetate have to be added in the percentage of 1% - 50% in addition to the solvent of higher eluting power.
Hexanes and Toulene are often used in TLC (Thin Layer Chromatography ) as a Base.
The reason behind this is they are non-polar compounds.
The best-used solvent is Hexane.

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3 years ago

Ultraviolet radiation and radiation of shorter wavelengths can damage biological molecules because they carry enough energy to b

Alja [10]

Answer:

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Explanation:

Energy of a quantum can be calculated using below formula

E=hv...........eqn(1)

But v=λ/ c .........eqn(2)

If we substitute eqn(2) into eqn(1) we have

E= hc/(λ)

Where E= energy

h= Plank's constant= 6.62607004 × 10-34 m2 kg / s

c= speed of light

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But the energy was given in Kj , it must be converted to Kj/ photon for unit consistency.

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If we make λ subject of the formula

λ= hc/E

Then substitute the values we have

λ= [(6.626 × 10^-34) × (2.998 × 10^8)]/451.83× 10^-24

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λ=439.7nm

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4 years ago