Chemistry

Problem

\text{NO}

and

\text{NO}_2

are mixed in a container at constant volume to attain for the equilibrium :

2\text{NO}_2 \rightleftharpoons \text{N}_2\text{O}_4 \quad \text{NO} + \text{NO}_2 \rightleftharpoons \text{N}_2\text{O}_3

If partial pressures of

P'_{\text{NO}_2}

and

P'_{\text{N}_2\text{O}_4}

are 0.5 and 1.7 atm respectively and equilibrium pressure is 5.05 atm, the initial pressure (atm) of

\text{NO}

would be : a. 2.20 b. 2.85 c. 3.20 d. 3.85