Question

which statement correctly describes a reaction in dynamic equilibrium?
at dynamic equilibrium, the reactions stop and the amounts of reactants and products do not change.
at dynamic equilibrium, the reactions continue but the amounts of reactants and products do not change.
at dynamic equilibrium, the reactions stop but the amounts of reactants and products are changing.
at dynamic equilibrium, the reactions continue and the amounts of reactants and products are changing

Explanation:

In dynamic equilibrium for a chemical reaction, the forward and reverse reactions occur at the same rate. This means the reactions (forward and reverse) continue to happen, but since their rates are equal, the net amounts of reactants and products remain constant (do not change). The other options are incorrect: the first and third say reactions stop (which is wrong as it's dynamic, so reactions continue), and the fourth says amounts are changing (but at equilibrium, the concentrations/amounts are constant as rates of forward and reverse are equal).

Answer:

B. At dynamic equilibrium, the reactions continue but the amounts of reactants and products do not change