Which of the following is a postulate of the kinetic-molecular theory? A. Gases are made up of particles that act like small, soft spheres that are always moving in a calculated fashion. B. Gas particles travel in a random pattern until they hit a container wall or another gas particle. C. The distance between gas particles is equal to the size of the particles themselves. D. Gas particles have no force of attraction on one another or to the walls of the container.

B. Gas particles travel in a random pattern until they hit a container wall or another gas particle.

Explanation:

The  kinetic-molecular theory has several postulates;

The space occupied by the individuals gas molecules is negligible compared to the total volume of the gas

The molecules move randomly and their directions only changed after collision with other gas molecules of the walls of the container

There is no other influence between the gas molecules other than the collisions.

All the collisions of the gas molecules are elastic

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.