A chemist needs to determine the concentration of a solution of nitric acid, HNO3. She puts 715 mL of the acid in a flask along with a few drops of indicator. She then slowly adds 0.800 M Ba(OH)2 to the flask until the solution turns pink, indicating the equivalence point of the titration. She notes that 115 mL of Ba(OH)2 was needed to reach the equivalence point.

How many moles of HNO3 are present if 9.20Ã10^â2 mol of Ba(OH)2 was needed to neutralize the acid solution?

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A chemist needs to determine the concentration of a solution of nitric acid, HNO3. She puts 905 mL of the acid in a flask along with a few drops of indicator. She then slowly adds 0.200 M Ba(OH)2 to the flask until the solution turns pink, indicating the equivalence point of the titration. She notes that 225 mL of Ba(OH)2 was needed to reach the equivalence point.

a) How many moles of Ba(OH)2 are present in 225 mL of 0.200 M Ba(OH)2?

Express your number numerically in moles.

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