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2AB(2)(g) iff A(2)(g)+2B(2)(g). 5 moles ...

`2AB_(2)(g) iff A_(2)(g)+2B_(2)(g)`. 5 moles of `AB_(2)` were heated in a closed vessel to constant temperature. Equilibrium was attained by the time 2 moles of it dissociated. If the equilibrium pressure was 12 atm, the `K_(p)` of the reaction is very close to

A

0.9

B

0.72

C

0.6

D

0.27

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A
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