Calculate the mass of potassium required to react with 4.48 L of chlorine.

First, we write down the formula for the reaction of potassium and chlorine
2K + Cl2 = 2KCL
Now we will find the amount of chlorine substance that has reacted
n (Cl2) = V / Vm = 4.48 l / 22.4 l / mol = 0.2 (mol)
According to the reaction equation, we see that the mole of potassium = 2 * mole of chlorine;
Hence, n (K) = 2 * 0.2 mol = 0.4 (mol)
M (K) = Mr (K) = 39 (g / mol)
Knowing the molar mass of potassium and the amount of potassium substance, we find the mass of potassium that has reacted
m (K) = M * n = 39 g / mol * 0.4 mol = 15.6 (g)
Answer: m (K) = 15.6 g