Question

describe the relationship between moles and atoms

Answer 1

1 mole is defined as the amount of an atom or ion or molecule or compound that contains Avogadro's number (Na = 6.023x10²³) of atom or ion or molecule or compound respectively. e.g.

12.0 g of carbon contains 6.023x10²³ carbon atoms. Hence mass of 1 mole of carbon atom is 12.0 g. 12.0 g of carbon is also called atomic mass of carbon and is represented by 12.0 g/mol.

Hence mass of a single carbon atom = atomic mass / Na = (12.0 g/mol) / (6.023x10²³ atoms/mol)

= 1.992x10^-23 g

A single carbon atom contains 6 protons, 6 neutrons and 6 electrons.