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The complete balanced equation is as follows: ch4(g)+4br2(g)⇌cbr4(g)+4hbr(g) determine the kc expression for the reaction above by identifying what belongs in the numerator and what belongs in the denominator:

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meerkat18
There are two types of equilibrium constants: Kc for concentration and Kp for partial pressure. When the reaction involves gaseous substances, Kp is applied. Hence, we use Kp here instead of Kc. The Kp for this reaction is:

For a reaction with a general form of:

aA + bB --> cC + dD
The expression for Kp is
Kp = [C^c][D^d]/[A^a}{B^b]

Following this format, the answer is then

Kp = [HBr]⁴[CBr₄]/[CH₄][Br₂]⁴

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