Which of the following is not a common way for a lake to form? a volcano creates a crater that water can pool into
fast-moving water carves its way through a mountain
land is scooped out by a glacier, and water collects
an earthquake moves the land, creating a space for water to collect

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)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.