In a period of 1.00 s, 5.00 X 1023 nitrogen molecules strike a wall with an area

Question:

In a period of 1.00 s, 5.00 X 1023 nitrogen molecules strike a wall with an area of 8.00 cm2. If the molecules move with a speed of 300 m/s and strike the wall head-on in elastic collisions, what is the pressure exerted on the wall? (The mass of one N2 molecule is 4.68 X 10-26 kg.)