Practice Exam 2 (CH 12 and CH13) Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows: [P4O10]eq =2.000 moles, [P4]eq = 3.000 moles, [O2]eq = 4.000 M P4O10(s) ⇌ P4(s) + 5O2(g) A) 20.00 B) 4.000 C) 1.320 D) 1536 E) 1024 3) For the production of HI, the overall reaction is: H2(g) + I2(g) ⇌ 2HI(g). The experimental rate is found to be ���� = �[�*][�*] but I- is known to be an intermediate. The following mechanism has been proposed: