A SCUBA diver with a 4-liter lung capacity is at a depth of 135 feet (4 atm.) She ascends to the surface where the
pressure is 1 atm. What is her new lung volume?

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons

)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.

What’s the theoretical yield of solid lead