Which of the following is true about a system at equilibrium? September 21, 2022 by 8i9x6 The concentration(s)of the reactant(s)is equal to the concentration(s)of the product(s). No new product molecules are formed. The concentration(s)of reactant(s)is constant over time. The rate of the reverse reaction is equal to the rate of the forward reaction and both rates are equal to zero. None of the above (A-D)is true. See Answer The concentration(s)of reactant(s)is constant over time.