Calculate how much potassium is required to react with 0.18 mol of sulfur.

1. The interaction of potassium with sulfur leads to the formation of potassium sulfide:

2K + S = K2S;

2.determine the chemical amount of potassium required for the reaction:

2 mol of K react with 1 mol of S;

x mol K – with 0.18 mol S;

x = 2 * 0.18: 1 = 0.36 mol;

3.Calculate the mass of potassium:

m (K) = n (K) * M (K) = 0.36 * 39 = 14.04 g.

Answer: 14.04 g.