Question

write a short note on valency and mole concept and SI unit and conservation of temperature and concentration of solution and atomic mass and molar mass and molecules and atoms molecules and protons neutrons and​

Answer 1

Mole can be defined as a unit which represents 6.023 x1023 particles of same matter. A mole (symbol mol) is defined as the amount of substance that contains as many atoms, molecules, ions, electrons or any other elementary entities as there are carbon atoms in exactly 12 gm