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200 mL of a 0.844 M HCl aqueous solution is mixed with 200 mL of 0.422 M Ba(OH)2 aqueous solution in a coffee-cup calorimeter. Both the solutions have an initial temperature of 27.5 °C. Calculate the final temperature of the resulting solution, given the following information: H+(aq) + OH- (aq) → H2O(ℓ)       ΔHrxn = -56.2 kJ/mol Assume that volumes can be added, that the density of the solution is the same as that of water (1.00 g/mL), and the specific heat of the solution is the same as that f