Phosphorus has the molecular formula P4 and sulfur has the molecular formula S8. How many grams of phosphorus contain the same number of molecules as 6.60 g of sulfur?

To find the number of grams of phosphorus (P4) that contains the same number of molecules as 6.60 g of sulfur (S8), we first calculate the number of moles of sulfur. The molar mass of S8 is approximately 256 g/mol, so 6.60 g of S8 is about 0.0258 moles. Since P4 has a molar mass of about 123.88 g/mol, the same number of molecules in phosphorus would be found in 0.0258 moles of P4, which corresponds to approximately 3.20 g of phosphorus.