25.0 ml of a hydrofluoric acid solution of unknown concentration is titrated with 0.200 m naoh. after 20.0 ml of the base solution has been added, the ph in the titration flask is 3.00. what was the concentration of the original hydrofluoric acid solution. [ka(hf)

How is 0.00235 expressed in proper scientific notation? a. 2.35 × 10-3 b. 0.235 × 10-2 c. 2.35 d. 2.35 × 103

Select the correct answer. when carbon dioxide dissolves in water, it sometimes reacts with water to form carbonic acid as in this balanced equation: co2 + h2o → h2co3. if 495 milliliters of carbon dioxide at 25°c and 101.3 kilopascals reacts with excess water, what is the theoretical yield of carbonic acid? use the periodic table and the ideal gas resource a. 0.889 g b. 1.10g c. 1.27g d. 2.02g what's the answer! quick!

The three types is stress that act on earths rocks are compression, tension, and