A system at equilibrium in a 1.0-liter container was found to contain 0.20 mol of A, 0.20 mol of B, 0.40 mol of C, and 0.40 mol of D. If 0.12 mol of A and 0.12 mol of B are added to this system, what will be the new equilibrium concentration of C?
A(g) + B(g) C(g) + D(g)
a. 0.32 M
b. 0.13 M
c. 0.24 M
d. 0.40 M
e. 0.48 M
Answer: e. 0.48 M