Kc is the equilibrium constant for a chemical reaction, which is a measure of the ratio of products to reactants at equilibrium. It is calculated by taking the concentration of the products, divided by the concentration of the reactants, each raised to the power of their respective coefficients in the balanced chemical equation.
In this reaction, B is a reactant and it is completely consumed in the forward reaction to produce the product C. Therefore, at equilibrium, there is no more B remaining and its concentration is equal to 0.
The value of Kc indicates the position of equilibrium for the reaction. If Kc is a large number, it means that at equilibrium, there are more products than reactants, and the reaction favors the formation of products. If Kc is a small number, it means that at equilibrium, there are more reactants than products, and the reaction favors the reactants.
The value of Kc is not affected by the initial concentrations of A and B. It is a constant for a particular reaction at a given temperature, and it only changes if the temperature is changed. However, changing the initial concentrations of A and B will affect the position of equilibrium and the amount of products formed.
No, Kc can only be calculated for reactions that involve gases or aqueous solutions. It cannot be calculated for reactions involving solids or pure liquids because their concentrations do not change during the reaction, and therefore do not affect the equilibrium.