It's because of Avagadro's number.
- It is known as Avagadro's constant too.
- It states that at constant temperature one mole of any substance contain same number of atoms i.e n no of atoms
where

Answer:
Distance, some kind of distance or length.
Explanation:
Isndidndjncidbdjbfidhjdbidhxidhfidhjfjxidjdidjdj
nabr + cacl2 are the products
£ is not a molecule. It is a currency. That is pounds sterling, used in the U.K.