Question

The Kc for the following is 5.0 at 100 degrees Celsius.

If an equilibrium mixture contains 0.53 M NO2 what is the molar concentration of N2O4?

Answer 1

1.40M = [N2O4]

Step-by-step explanation:

Based on the reaction:

2NO2(g) ⇄ N2O4(g)

Kc is defined as:

Kc = 5.0 = [N2O4] / [NO2]²

Where [] are the concentrations in equilibrium of each gas

As the equilibrium concentration of NO2 is 0.53M:

5.0 = [N2O4] / [0.53]²

5.0 = [N2O4] / [0.2809]

5.0*0.2809 = [N2O4]

1.40M = [N2O4]