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.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.