Answer: True
Step-by-step explanation:
A mole is defined as the amount of substance that contains Avogardro number of the substance. Avogadro's number is given by
.
![1mole=6.022* 10^(23)objects](https://img.qammunity.org/2020/formulas/chemistry/high-school/l2ni15wgf05mfdswmk62xsqh4j2t2xxro0.png)
According to avogadro's law, 1 mole of every substance occupies 22.4 Liters at STP and contains avogadro's number
of particles.
Thus the statement saying Avogadro's number is the number of particles in one mole of a pure substance is true.