Which is not a characteristic of chemical equilibrium

Chemical equilibrium is theequilibrium state in which the concentrations of reactants andproducts is not changed with time. ... Theory Physical equilibrium includes the coexistence of two physical states inside the same closed system.Chemical equilibriums include equal rates of forward and backward reactions.

Explanation:

C. The reactions go to completion

Explanation:

The point that reactions go to completion is not a characteristic of chemical equilibrium. Chemical equilibrium is the state in which both reactants and products are present in concentrations which have no further tendency to change with time. At this point the rate of the forward reaction equals the rate of the backward reaction. Characteristics of equilibrium include; they occur in reversible reactions, there is no net change in concentrations of reactants and products, and also the forward and reverse rates are the same.  

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

there is none because earth is stationary and flat.