In the kinetic molecular theory of gas behavior, the assumption is made that gas molecules in the kinetic molecular theory of gas behavior, the assumption is made that gas molecules a. move rapidly in random directions. b. are attracted to each other by strong forces. c. are close together in their container. d. occasionally come to rest. e. move with a kinetic energy equal to their centigrade temperature.

The correct option is: a. move rapidly in random directions

Explanation:

According to the kinetic molecular theory of gases, a gas consists of fast moving small particles called molecules, that are in constant random motion. These molecules have the same mass and the average kinetic energy of these gaseous molecules is directly dependent to absolute temperature of the system.

Therefore, the kinetic theory of gases includes the assumption: gaseous molecules move rapidly in random directions.

n2(g) + 3h2-> 2nh3(g)   this is the balanced equation

note the mole ratio between n2, h2 and nh3.   it is 1 : 3 : 2   this will be important.

moles n2 present = 28.0 g n2 x 1 mole n2/28 g = 1 mole n2 present

moles h2 present = 25.0 g h2 x 1 mole h2/2 g = 12.5 moles h2 present

based on mole ratio, n2 is limiting in this situation because there is more than enough h2 but not enough n2.

moles nh3 that can be produced = 1 mole n2 x 2 moles nh3/mole n2 = 2 moles nh3 can be produced

grams of nh3 that can be produced = 2 moles nh3 x 17 g/mole = 34 grams of nh3 can be produced

note:   the key to this problem is recognizing that n2 is limiting, and therefore limits how much nh3 can be produced.