Question

If the initial concentration of F(g) is 8.285 mol/L, calculate the % decomposition of F(g) when the reaction comes to equilibrium according to the balanced equation. The value of Kc at 927.0 °C is 370.00. The initial concentration of the reaction products is 0 mol/L.


2F(g) = F2(g)

Answer 1

You have the balanced equation.
Set up an ICE chart, substitute into Kc and solve.
initial:
F = 8.285 M
F2 = 0

change:
F2 = +x
F = -2x

equilibrium:
F = 8.285-2x
F2 = x

Answer 2

i don't understand..