1. Find the molar mass of sulfur:
* The molar mass of sulfur (S) is 32.06 g/mol.
2. Calculate the number of moles:
* Divide the given mass by the molar mass:
* moles of sulfur = 72.0 g / 32.06 g/mol = 2.24 mol
3. Use Avogadro's number:
* Avogadro's number tells us the number of atoms in one mole of any element: 6.022 x 10²³ atoms/mol.
4. Calculate the number of atoms:
* Multiply the number of moles by Avogadro's number:
* number of sulfur atoms = 2.24 mol * 6.022 x 10²³ atoms/mol = 1.35 x 10²⁴ atoms
Therefore, there are approximately 1.35 x 10²⁴ atoms in 72.0 g of sulfur.
