111. Solving a chemistry problem

The surface area of 2 grams of activated carbon is 2000 m2. How many liters of ammonia at a temperature of 25 degrees and a pressure of 1.2 atm are adsorbed on the surface of 50 grams of coal if the degree of surface filling is 0.98? The diameter of the molecule is 3.5 * 10-10 meters, the molecules touch each other in the plane of the monolayer so that the centers of neighboring molecules are located at the corners of a regular triangle (the shape of the molecule is considered spherical)