Determine the amount of mols in 1.50 X 10^23 atoms of Cl2.

0.249 moles

Explanation:

Given:

No. of atoms= 1.50 X 10^23 atoms

NA= 6.022 X 10^23 atoms

To Find:

Moles= ?

Solution:

Mole = No. of atoms/NA

= 1.50 X 10^23/6.022 X 10^23

= 0.249 moles

Explanation:

It is necessary to run TLC in a closed container and have the interior saturated with the solvent vapor to ensure maximum resolution between components and to prevent solvent evaporating off. If the solvent evaporates off, the Rf value would be lower than the expected value.