1) If a weak acid has a pKa = 4.25, what is its Ka PRa%3= lory 4,75=-leg Pa - ka Ra= io-4.25 %3D 2) How many mmoles of sodium hydroxide have been added if 10.54 mL of 0.124 M solution afe added to a titration? Kaz5.62 x105 mili mues 3) If the sodium hydroxide solution in problem 2 is added to 50.00 mL of 0.118 M hydrochloric acid, how many mmoles of hydrochloric acid remain? milli moles

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Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.