Question

In the reversible reaction shown below, r moles of a react with s moles of b to produce t moles of
c. which equation can be used to represent the equilibrium constant for the forward reaction?

Answer 1

The equilibrium constant divides the products by the reactants.

So, if r+sb=t(whatever variable used here)

r & b would be your reactants & (left out variable) would be your product. The # of moles would be used as exponents.
$eq \: constant = \frac{r \times {b}^{s} }{ {x}^{t} }$
Hope that helps!