What is the concentration of hcl in the final solution when 65 ml of a 9.0 m hcl solution is diluted with pure water to a total volume of 0.15 l?

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

)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.