2.50 mol of sulfur is 80.05 g of sulfur. Here's how we calculate that:

* Molar mass of sulfur: The molar mass of sulfur is 32.065 g/mol. This means that one mole of sulfur atoms weighs 32.065 grams.

* Calculation: To find the mass of 2.50 moles of sulfur, we multiply the molar mass by the number of moles:

2.50 mol * 32.065 g/mol = 80.05 g