Chemistry ICE problem help, please.

Posted on 2016-10-20 18:41:00 in Chemistry by NOIREN

Formamide, used in the manufacture of pharmaceuticals, dyes, and agricultural chemicals, decomposes at high temperatures. 
HCONH2(g) ⇌ NH3(g) + CO(g) 
Kc = 4.84 at 400K 

If 0.188 mol HCONH2(g) dissociates in a 2.18 −L flask at 400 K, what will be the total pressure at equilibrium? 

I got 60.6 atm, but the answer is 5.61 atm. Can someone help with the steps. Do I have to use Molarity in the ICE chart or moles. How do I find pressure?

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