1. Determine the molar mass of oxygen gas (O2):
* Oxygen has an atomic mass of approximately 16 g/mol.
* Oxygen gas (O2) has a molar mass of 2 * 16 g/mol = 32 g/mol.
2. Calculate the number of moles of oxygen gas:
* moles = mass / molar mass
* moles = 16 g / 32 g/mol = 0.5 mol
3. Use Avogadro's number to find the number of molecules:
* Avogadro's number: 6.022 x 10^23 molecules/mol
* Number of molecules = moles * Avogadro's number
* Number of molecules = 0.5 mol * 6.022 x 10^23 molecules/mol
* Number of molecules = 3.011 x 10^23 molecules
4. Calculate the number of atoms:
* Since each oxygen molecule (O2) contains 2 oxygen atoms:
* Number of atoms = Number of molecules * 2
* Number of atoms = 3.011 x 10^23 molecules * 2
* Number of atoms = 6.022 x 10^23 atoms
Therefore, there are approximately 6.022 x 10^23 atoms in 16g of oxygen gas.
