Calculate the mass of potassium that you need to take to interact with 16 g of bromine.

1. Let’s compose the equation of interaction of potassium with bromine:

2K + Br2 = 2KBr;

2.Calculate the chemical amount of bromine:

n (Br2) = m (Br2): M (Br2) = 16: 160 = 0.1 mol;

3. find the amount and calculate the mass of potassium:

n (K) = n (Br2): 2 = 0.1: 2 = 0.05 mol;

m (K) = n (K) * M (K) = 0.05 * 39 = 1.95 g.

Answer: 1.95 g.