Question

The Chemistry Concept - Avogadro
What is Avogadro number?

Answer 1

the number of atoms or molecules in one mole of a substance, equal to 6.023 × 1o to the power 23 

Answer 2

The mole allows scientists to calculate the number of elementary entities (usually atoms or molecules) in a certain mass of a given substance.
Avogadro's number is an absolute number: there are 6.022×1023 elementary entities in 1 mole. This can also be written as 6.022×1023 mol-1.The mass of one mole of a substance is equal to that substance's molecular weight. For example, the mean molecular weight of water is 18.015 atomic mass units (amu), so one mole of water weight 18.015 grams.