Certain amounts of the hypothetical substances A2 and B are mixed in a 3.00-liter container at 300. K. When equilibrium is established for the reaction the following amounts are present: 0.200 mol of A2, 0.400 mol of B, 0.200 mol of D, and 0.100 mol of E. What is Kp, the equilibrium constant, in terms of partial pressures, for this reaction?
A2(g) + 3B(g) 2D(g) + E(g)
a. 16.4
b. 0.084
c. 3.81 × 10^−2
d. 1.42 × 10^−2
e. 2.50 × 10^−1
Answer: c. 3.81 × 10^−2