Question
What is the utility of the mole concept?
Solution
Utility of mole concept.
(i) From the number of moles of a substance, we can calculate the number of elementary particles because the number of moles of a substance is directly proportional to the number of elementary particles.
(ii) One mole of a gas occupies 22.4 litres at S.T.P. (273 K and 1 atm).
(iii) One mole of any gas under the same conditions of temperature and pressure occupies the same volume.
(iv) One mole is equal to molecular mass in grams which is equal to 6.023 x 1023 atoms, molecules, ions etc. Thus, we can calculate absolute masses of atoms and molecules.
