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The equilibrium constant, Kc, for the reaction N2O4(g)⇌2NO2(g) is 5.0×10−3. If the equilibrium mixture contains [NO2] = 0.050 M , what is the molar concentration of N2O4? Express the concentration to two significant figures and include the appropriate units.

Respuesta :

Answer:

0.50 M is the molar concentration of [tex]N_2O_4[/tex].

Explanation:

The equilibrium constant of the reaction = [tex]K_c=5.0\times 10^{-3}[/tex]

[tex]N_2O_4(g)\rightleftharpoons 2NO_2(g)[/tex]

Equilibrium concentration of [tex]NO_2[/tex] = 0.050 M

[tex][NO_2]=0.050 M[/tex]

Equilibrium concentration of [tex]N_2O_4[/tex] = ?

[tex][N_2O_4]= x[/tex]

The equilibrium constant of the reaction is given aSL:

[tex]K_c=\frac{[NO_2]^2}{[N_2O_4]}[/tex]

[tex]K_c=\frac{(0.050 M)^2}{x}=5.0\times 10^{-3}[/tex]

[tex]x = 0.50 M[/tex]

0.50 M is the molar concentration of [tex]N_2O_4[/tex].