Question

An Avogadro number of molecules are present in ___.

• A. 1 mole of a substance
• B. 10 moles of a substance
• C. 100 moles of a substance
• D. 1000 moles of a substance

Answer 1

The correct option is A

1 mole of a substance

1 mole of any substance have Avogadro number of atoms/molecules. It's value is $6.023\times {10}^{23}$. If we take $6.023\times {10}^{23}$ particles of any susbstance, it is equal to 1 mole.