14 de diagnowanderthe two wepo pratau, *** heet sopper) hent sorden quld w a. State and explain the observations made the observations in tube 1.combustion tube il and combustion lube dll (mks) b. Write equation for the reaction for the reaction occurring at combustion tube I and Ill (1mk) C. give a reason why ice is mixed with sodium chloride (mk) d. describe how the identity of substance W can be determined (imk) e. describe how you can determine if liquid W is pure (2mks)give a reason give a reason why it is mixed with sodium chloride ​

Which best explains why an iceberg floats?

Which process transfers heat from inside earth to its surface? convection currents in mantle pulling away of tectonic plates drawing in of tectonic plates convection currents in crust

)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.