Question

I KNOW THAT 1 MOLE OF ANY SUBSTANCE=6.023*10623 ATOMS OF CARBON-12 ISOTOPE.
BUT HOW CAN WE DEFINE 1 MOLE OF CO₂ OR 1 MOLE OF NACL

Answer 1

1. 1 mole of any substance contain 6.023 $\times$ 10²³ number of atoms/molecules/sub-atomic particles.

2. Thus, 1 mole of CO₂ and NaCl both contain ​6.023 $\times$ 10²³ molecules CO₂ and NaCl respectively.