At a Certain Temperature,K_c Equals 1

question 31

Multiple Choice

At a certain temperature,K_c equals 1.40 × 10² M^-1 for the reaction:
2 CO(g) + O₂(g) ⇌ 2 CO₂(g)
If a 3.00 L flask contains 0.400 mol of CO₂ and 0.100 mol of O₂ at equilibrium,how many moles of CO are also present in the flask?

• A)0.555 mol
• B)0.185 mol
• C)0.107 mol
• D)0.0114 mol

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