2 Which energy change takes place when
an electric hair dryer is used?
F electricity to light energy
G electricity to sound energy
H electricity to heat and sound energy
1 electricity to heat and chemical
energy

What substance has a mass of 9.5g and volume of 2.1cm^3

)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 are the coefficients that will balance the skeleton equation below? n2 + h2 → nh3