A. At what pH are about 1/2 of the carboxyl groups ionized? pH = B. Where does the amino acid have a net charge of +1? below pH 2.34 at pH = 2.34 at pH = 6.01 at pH = 9.69 above pH 9.69 C. At what point has enough base been added to react with 1/2 of the COOH groups? 1/2 of COOH reacted = equivalents OH− when 1/2 of COOH has reacted, the pH = D. At which pH value does the amino acid have the best buffering capacity? 1.53 10.5 2.34 6.01 3.00 9.00 E. What is the pI (isoelectric point)? pI =

What method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots

Which formula can be used to calculate the molar mass of hydrogen peroxide

Problem page combustion of hydrocarbons such as pentane ( c5 h12 ) produces carbon dioxide, a "greenhouse gas." greenhouse gases in the earth's atmosphere can trap the sun's heat, raising the average temperature of the earth. for this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.(a) write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. (b) suppose 0.350 kg of pentane are burned in air at a pressure of exactly 1 atm and a temperature of 20.0 degree c. calculate the volume of carbon dioxide gas that is produced.be sure your answer has the correct number of significant digits.