Answer:
A. K = 59.5
Explanation:
Hello there!
In this case, since this reaction seems to start moving leftwards due to the fact that neither A nor Y are present at equilibrium, we should rewrite the equation:
3C (g) + D (g) <-- --> 2A (g) + Y (g)
Thus, the equilibrium expression is:
Next, according to an ICE table for this reaction, we find that:
Whereas x is calculated by knowing that the [C] at equilibrium is 0.456M; thus:
Next, we compute the rest of the concentrations:
Thus, the equilibrium constant for the leftwards reaction is:
Nonetheless, we need the equilibrium reaction for the rightwards reaction; thus, we take the inverse to get:
Therefore, the answer would be A. K = 59.5.
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