Which best describes how energy changes form in a car’s engine? 1.A single transformation occurs because the chemical energy of the fuel is changed to the mechanical energy of the car. 2.A single transformation occurs because the mechanical energy of the car originates from one spark. 3.Multiple transformations occur because the chemical energy of the fuel is changed to several forms of energy. 4.Multiple transformations occur because the chemical energy of the fuel must be replenished to keep the car running.

You mix the pks of succinic acid are 4.21 and 5.64. how many gramsa graduate student at sdsu wants to measure the activity of a particular enzyme at ph 4.0. to buffer her reaction, she will use a buffer system based on one of the acids listed below, which acid is most appropriate for the experiment? of monosodium succinate (fw = 140 g/mol) and disodium succinate (fw = 162 g/mol) must be added to 1 l of water to produce a solution with a ph 5.28 and a total solute concentration of 100 mm? (assume the total volume remains 1 liter, answer in grams monosodium succinate, grams disodium succinate, respectively.) volumes of 0.05 m nah2po4 and 0.05 m na2hpo4 (pk's for phosphoric acid are 2.15, 6.82 and 12.38). which of the following best describes the resulting solution?