Lead is to be deposited at a cathode from a solution that is 0.150 M in Pb21 and 0.215 M in HClO4. Oxygen is evolved at a pressure of 0.850 atm at a 30-cm2 platinum anode. The cell has a resistance of 0.900 V. (a) Calculate the thermodynamic potential of the cell. (b) Calculate the IR drop if a current of 0.220 A is to be used.

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?

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles