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Determination of Products from Equilibrium Constant

CHEM-SZRFJ1

Consider the following reaction at some temperature.

$$2\textrm{CO}(g)+ \textrm{O}_2(g) \rightleftharpoons 2\textrm{CO}_2(g) \qquad K=4.0$$

$5.0 \textrm{ mol}$ of $\textrm{CO}$ and $6.0 \textrm{ mol}$ of $\textrm{O}_2$ are added to a $1 \textrm{ L}$ container and the reaction proceeds to equilibrium.

At equilibrium, how many moles of $\textrm{CO}_2$ are present in the reaction container?

A

$1.0 \textrm{ mol}$

B

$2.0 \textrm{ mol}$

C

$4.0 \textrm{ mol}$

D

$6.0 \textrm{ mol}$

E

$12 \textrm{ mol}$