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Calculate the concentration of barium in the solution at equilibrium when 15.0 mL of 0.200 M K2CrO4 is added to 25.0 mL of 0.100 M BaCl2.? How do you know what set up a oxidation equation equal to? How do I factor a^2-b^2+14x-49 ? Thanks? What is the average lifespan for a human? Identify the maximum and minimum values of the function y = 8 cos x in the interval [-2π, 2π]?