Question

Write the equilibrium-constant expression for the reaction shown in terms of
[A],[B],[C],and [D].
3A(g)+B(g)↽−−⇀2C(g)+2D(g)

Answer 1

For the given reaction

$3A_{(g)}+B_{(g)} \rightleftharpoons 2C_{(g)} + 2D_{(g)}$

equilibrium-constant expression will be

$K_c=\frac{[C]^2 \cdot [D]^2}{[A]^3 \cdot [B]}$

where [A], [B], [C], and [D] are molar concentrations of A, B, C, and D respectively.