# Partial Pressure 1

Chemistry Level pending

There are $$10.0$$ mol CO and $$12.5$$ mol O$$_{2}$$ in a container. The mixture is now heated, and CO$$_{2}$$ is formed by following reaction:

$\text{CO}(g) + \frac{1}{2} \text{O}_{2}(g) \rightarrow \text{CO}_{2}(g).$

What is the mole fraction of CO when $$3.0$$ mol CO$$_{2}$$ is present in the mixture?

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