The progress of the reaction A ⇌ nB, with time is represented by the graph given below. (A drops fro — Chemical Equilibrium Chemistry Question

💡 Solution & Explanation

The concentration of A decreases from 0.5 M to 0.3 M, a change of -0.2 M. The concentration of B increases from 0.1 M to 0.5 M, a change of +0.4 M. The stoichiometry n is the ratio of change in B to change in A: n = 0.4 / 0.2 = 2. Therefore, correct answer is B.