Define colloid. Group of answer choices a mixture in which a substance is dissolved in a solvent a mixture in which a substance settles to the bottom of a dispersing medium a mixture in which a dispersed substance is finely divided in a dispersing medium a mixture in which a substance floats on the dispersing medium a mixture in which a substance is dissolved in a solute

What layer of the atmosphere is directly above the troposphere?

Which of these conditions most likely produces an unstable isotope?

)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.