Questions: Concentration 0.1 0.2 0.3 0.4 Time (s) 0.5 200 400 600 800 0.0 100 300 500 700

Transcript text: Concentration 0.1 0.2 0.3 0.4 Time (s) 0.5 200 400 600 800 0.0 100 300 500 700

Solution

Solution Steps

Step 1: Find the equilibrium concentration of B

The graph shows that the concentration of B levels off at approximately 0.12 M.

Step 2: Find the equilibrium concentration of A

The graph shows that the concentration of A levels off at approximately 0.54 M.

Step 3: Write the equilibrium expression

The balanced reaction is 2A(g) ⇌ B(g). Therefore, the equilibrium expression is: \(K_c = \frac{[B]}{[A]^2}\)

Step 4: Substitute and calculate Kc

Substitute the equilibrium concentrations into the equilibrium expression: \(K_c = \frac{0.12}{(0.54)^2}\) \(K_c = \frac{0.12}{0.2916}\) \(K_c \approx 0.41\)

Final Answer

\\(\boxed{K_c = 0.41}\\)

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