H2 + I2 <====> 2 HI.

Question

Looking for Keq:
Complete the equation. Assume all concentrations are equilibrium constants in mol/L , M
Temp in Celcius = 25
[H2] = .355
[I] = .388
[HI] = .0922
K eq = ??

Answer 1

Note the correct spelling of celsius.
Keq = (HI)^2/(H2)(I2)
Substitute and calculate.

Answer 2

6.17