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Concentration of reactants and products at equilibrium vary with each reaction and with . A) temperature B) pressure C) particle size D) time __

19) When setting up an equilibrium expression, you can eliminate . A) gases B) aqueous solutions C) coefficients D) state symbols

20) Only gases and are considered in the equilibrium of a reaction. A) liquids B) aqueous solutions C) solids D) fine particles

21) In a reversible reaction, products must achieve enough energy to form the . A) new products B) activated complex C) reactants D) gases