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A 5.50 −g sample of a weak acid with Ka=1.3×10−4 was combined with 4.90 mL of...

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Chemistry

A 5.50 −g sample of a weak acid with Ka=1.3×10−4 wascombined with 4.90 mL of 6.20 M NaOH and the resulting solution wasdiluted to 750 mL. The measured pH of thesolution was 4.35.

What is themolar mass of the weak acid?

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