The normal boiling point of ethanol is 78.85 ºC and the molar enthalpy of vaporization, ΔHvap, is 71.8 kJ/mol. What is the value of ΔSsys in J/K when 3.40 mol of ethanol (l) vaporizes at 78.85 ºC?

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?

How many miles of water are produced if 5.43 mol pbo2 are consumed

What is the mass of each element in a 324.8 sample of co2