Question

select the correct answer from each drop - down menu. what effect does a decrease in the concentration of nitrogen monoxide (no) gas have on the rate of reaction in this chemical equation? 2no(g) + h₂(g) → n₂o(g) + h₂o(g) a decrease in the concentration of nitrogen monoxide decreases the collisions between no and h₂ molecules. the rate of the forward reaction then dropdown with options: remains constant, increases, decreases

Explanation:

In a chemical reaction, the rate of reaction is related to the frequency of effective collisions between reactant molecules. According to collision theory, a decrease in the concentration of a reactant (here, NO) means there are fewer NO molecules available to collide with \(H_2\) molecules. Fewer collisions (both effective and total) will occur, which leads to a decrease in the rate of the forward reaction. So when the concentration of NO decreases, the number of collisions between NO and \(H_2\) decreases, and thus the rate of the forward reaction decreases.

Answer:

decreases