Some say that the fact that scientific models change over time is proof that scientists from earlier historical eras were bad at their jobs. which statement best argues against this position? scientists can only use the information available at the time to create their models / scientific models do not always get more accurate over time. 11 mathematical models are always more accurate than non-mathematical models. / the ultimate goal of science is to produce accurate models that predict behavior.

)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.