A beam of hydrogen molecules (H2) is directed toward a wall, at an angle of 45° with the normal to the wall. Each molecule in the beam has a speed of 2.8 km/s and a mass of 3.3 x 10^-24 g. The beam strikes the wall over an area of 4.5 cm2, at the rate of 10^22 molecules per second. What is the beam's pressure on the wall?