Which statement correctly describes a chemical equilibrium?

it must take place in an open system
the mass of the reactants and the mass of the products are no equal
it is affected by the addition of a catalyst
it does not involve a reversible reaction
the concentrations of reactants and products are equal

Question

Which statement correctly describes a chemical equilibrium? 

it must take place in an open system
the mass of the reactants and the mass of the products are no equal
it is affected by the addition of a catalyst 
it does not involve a reversible reaction
the concentrations of reactants and products are equal

nechirwan · Answer

the concentrations of reactants and products are equal