At a Certain Temperature,K_c Equals 1

question 18

Multiple Choice

At a certain temperature,K_c equals 1.4 × 10² for the reaction: 2 CO(g) + O₂(g) ⇌ 2 CO₂(g) .
If a 3.50-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) 0.700 mol
• B) 0.200 mol
• C) 0.107 mol
• D) 0.0114 mol

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