Equilibrium - Result Question 5

####6. Given the reaction between 2 gases represented by $A_2$ and $B_2$ to give the compound $AB(g)$.

$A_2(g)+B_2(g) \rightarrow 2 AB(g)$.

At equilibrium, the concentration

of $A_2=3.0 \times 10^{-3} M$

of $B_2=4.2 \times 10^{-3} M$

of $AB=2.8 \times 10^{-3} M$

If the reaction takes place in a sealed vessel at $527^{\circ} C$, then the value of $K_c$ will be : [2012 M]

(a) 2.0

(b) 1.9

(c) 0.62

(d) 4.5

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