Problem: A 7.91 g sample of an aqueous solution of hydrochloric acid contains an unknown amount of the acid. lf 10.6 mL of 1.55 M sodium hydroxide are required to neutralize the hydrochloric acid, what is the percent by mass of hydrochloric acid in the mixture?

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A 7.91 g sample of an aqueous solution of hydrochloric acid contains an unknown amount of the acid. 

lf 10.6 mL of 1.55 M sodium hydroxide are required to neutralize the hydrochloric acid, what is the percent by mass of hydrochloric acid in the mixture?

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