Answer: A mole contains Avogadro’s number of particles of a substance.
Explanation:
Avogadro number is defined as the number of particles (atoms or molecules) of present in per mole of that substance. It is denoted by symbol [tex]N_A[/tex].
According to mole concept, one mole of an atom contains Avogadro's number of particles of that substance.
[tex]1mole=N_A=6.022\times 10^{23} mol^{-1}[/tex]