Name five solvents available to the organic chemistry for use in the purification of organic compounds.

Explanation:

The solvent is a base or medium , in which reaction takes place ,

Mostly organic solvents have hydrogen and carbon , and is purposely used to dissolve the organic sample .

The example of organic solvents , used in laboratory are as follows -

1. Toluene

2. Hexane

3. Pentane

4. Benzene

5. Methanol

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.