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Which is a proper description of chemical equilibrium?
(A)The frequencies of reactant and of product collisions are identical.
(B)The concentrations of products and reactants are identical.
(C)The velocities of product and reactant molecules are identical.
(D)Reactant molecules are forming products as fast as product molecules are reacting to form reactants.
(E)The numbers of moles of reactants and products are equal.



Answer :

d) because both reactions are occurring at the same rate. They are not equal but their concentrations are constant.

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