What is the mass of 2.11 * 1024 sulfur atoms?

Avogadro's number represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. This number can be used to convert the number of atoms or molecules into number of moles. We do as follows:

2.11x 10^24 atoms (1 mol / 6.022x10^23 atoms) (32.06 g / 1 mol) = 112.33 g sulfur

Hope this answers the question.