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I am given $$ \Delta H^{\circ} /$$ &  $$ \Delta S^{\circ} /$$, and Temp (K)

I need to calculate $$ K_{p} /$$ at the given Temp (K).
I can solve for  $$ \Delta G^{\circ} /$$
then use this this equation:
$$ \Delta G = \Delta G^{\circ} + RTlnQ /$$

I just set $$ \Delta G=0 /$$ & solve for "Q".

My question is, will this Q value = $$ K_{p} /$$  or $$ K_{c} /$$ ?

[rabolisk]

There is a conversion between and

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Thank you.

I'm reading several different sources, some claim its kc some say its kp.

can you please explain why it is kc?