In a closed vessel, substance X(g) decomposes according to the balanced equation
3 X(g) → 2 Y(g)
Initially, only X is present. After 250 s of reaction, the following concentrations are measured:
[X]₂₅₀ = 0.250 M
[Y]₂₅₀ = 0.030 M
Answer the questions below.
(1) Calculate the initial concentration of X in the vessel.
(2) Construct a two-row concentration–time table (time = 0 s and time = 250 s) that lists [X] and [Y] at each of the two times.
(3) Compute the average rate of formation of Y, in mol L⁻¹ s⁻¹, over the first 250 s of reaction.