The value of $K_{C}$ for the equilibrium reaction: $CO_{2(g)} + C_{(s)} \rightleftharpoons 2CO_{(g)}$ at $T \ K$ is $0.036$. If the equilibrium concentration of $CO_{2(g)}$ is $0.004 \ M$,the concentration of $CO_{(g)}$ in $mol \ L^{-1}$ is:

  • A
    $3.6 \times 10^{-2}$
  • B
    $2.0 \times 10^{-2}$
  • C
    $1.2 \times 10^{-2}$
  • D
    $1.2 \times 10^{-3}$

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