A 300-Liter Flask Initially Contains 3 $\rightleftharpoons$ 2B + C
the Equilibrium Concentration of Gas C Is

A 3.00-liter flask initially contains 3.00 mol of gas A and 1.50 mol of gas B. Gas A decomposes according to the following reaction: 3A $\rightleftharpoons$ 2B + C
The equilibrium concentration of gas C is 0.134 mol/L. Determine the value of the equilibrium constant, K_c.

A) 0.172
B) 0.132
C) 3.19 × 10^-3
D) 0.370
E) none of these