Here's how to calculate the mass of 2.01 x 10²² sulfur atoms:

1. Moles:

* Use Avogadro's number (6.022 x 10²³ atoms/mol) to convert atoms to moles:

(2.01 x 10²² atoms) / (6.022 x 10²³ atoms/mol) = 0.0334 mol

2. Mass:

* Use the molar mass of sulfur (32.06 g/mol) to convert moles to grams:

(0.0334 mol) * (32.06 g/mol) = 1.07 g

Therefore, the mass of 2.01 x 10²² sulfur atoms is approximately 1.07 grams.