1. Find the number of moles:
* Molar mass of oxygen (O) = 16 g/mol
* Number of moles = (mass of oxygen) / (molar mass of oxygen)
* Number of moles = 16g / 16 g/mol = 1 mole
2. Use Avogadro's number:
* Avogadro's number = 6.022 x 10^23 atoms/mol
* Number of atoms = (number of moles) * (Avogadro's number)
* Number of atoms = 1 mol * 6.022 x 10^23 atoms/mol = 6.022 x 10^23 atoms
Therefore, there are 6.022 x 10^23 atoms present in 16g of oxygen.
