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Compute the molarity of the hydroxide ions (OH- )in a solution that has been made by adding 70.3 grams of barium hydroxide (Ba(OH)2) in H2O(water) and diluting the solution to a final volume of four litres. (molecular weights of elements are given as : O 16.0 g/mol, Ba 137.3 g/mol., and H 1.0 g/mol).

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