please bantu ya kawan???

1,2/4 0,8/4 0,8/4
kc = [cocl2]
______
[co] [cl]

kc= [0,3]
____
[0,2] [0,2]

kc = [0,3]
____
[0,4]

= 0,75 ->
[tex]7.5 \times {10}^{ - 1} [/tex]