a reaction takes place between two gases at 298 k. there are 2.0 moles of gas a and 3.0 moles of gas b. which scenario would  lower  the collision frequency between gases as well as the rate of reaction between gases a and b? a)increase the moles of gas b. b)lower the temperature of the reaction to 250 k. c)compress the gases into a smaller volume. d)introduce a catalyst to the container.

B)Lower the temperature of the reaction to 250 K.

Explanation:

Option B is correct. Lowering the temperature will decrease the kinetic energy of the gas molecules decreasing the frequency of collision and the rate of the reaction.

Option A is incorrect. Increasing the moles or the number of gas molecules of A and B will bring the gas molecules closer to each other, thus increasing the frequency of collision and the rate of the reaction.  

Option C is incorrect. Compressing the gas into a small volume will bring the gas molecules closer to each other, thus increasing the frequency of collision and the rate of the reaction.  

Option D is incorrect. A catalyst works by lowering the activation energy and thus increasing the frequency and orientation of the collision between gas molecules and thus increasing the rate of the reaction.  

if you mean hydrogen and oxygen then water is the product

the answer is c.the valence of the atoms combine .