The next three (3) problems deal with the titration of 321 ml of 0.501 m carbonic acid (h2co3) (ka1 = 4.3 x 10-7, ka2 = 5.6 x 10-11) with 1.9 m naoh. what is the ph of the solution at the 2nd equivalence point?

Aside from human impact, which of the following causes less water vapor production over a small area? (2 pderivartin

May someone me with these science questions

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.