1. Find the molar mass of S8:
* The atomic mass of sulfur (S) is approximately 32.06 g/mol.
* The molar mass of S8 is 32.06 g/mol * 8 = 256.48 g/mol
2. Calculate the number of moles of S8:
* Moles = mass / molar mass
* Moles = 16 g / 256.48 g/mol
* Moles ≈ 0.0624 mol
3. Use Avogadro's number to find the number of molecules:
* Avogadro's number is 6.022 x 10^23 molecules/mol
* Number of molecules = moles * Avogadro's number
* Number of molecules ≈ 0.0624 mol * 6.022 x 10^23 molecules/mol
* Number of molecules ≈ 3.76 x 10^22 molecules
Therefore, there are approximately 3.76 x 10^22 S8 molecules present in 16 grams of solid sulfur.
