The Bird of Paradise is a species that has been observed in the jungles of New Guinea. In an attempt to attract females, the males shake their bodies and sometimes hang upside down to show off their bright colors and long feathers. Females generally choose to mate with the "showiest" males. Which concept is supported by these observations?

For equilibrium reactions, it would be best to use the ICE method (Initial-Change-Equilibrium). Then, let x be the number of moles that reactedto form ICl. 

               2ICl  ------>  I2  + Cl2

I                0              0.75  0.75
C            +2x              -x      -x
--------------------------------------------
E              2x           0.75 -x  0.75 -x

Kc = [I2][Cl2]/[ICl2]^2 = 0.11, the [I2] represents concentration of I2 in mol/L at equilibrium


 
x = 0.451 moles

Thus [ICl] = (2x/2) = x = 0.451 mol/L