Certain amounts of the hypothetical substances A2 and B are mixed at 300. K. When equilibrium is established for the reaction below, the following amounts were present in a 3.00-liter container: 0.200 mole of A2, 0.400 mole of B, 0.200 mole of D, and 0.100 mole of E. What is Kp, the equilibrium constant, in terms of partial pressures (atm), for this reaction?
A2(g) + 3B(g) 2D(g) + 3E(g)
a. 16.4
b. 0.084
c. 3.81 × 10^−2
d. 2.57 × 10^−2
e. 1.46 × 10^−2
Answer: d. 2.57 × 10^−2