Radioisotopes emit radioactive particles as they decay, which is one of the reasons why they are used to study metabolic processes in living systems
Which of the following is another advantage of using radioisotopes?
OA Radioisotope analyses can be performed without significantly ahering systems.
OB Radioisotopes behave almost identically to their stable forms in metabolic processes
OC Radioisotopes are easily detected even in very small quantities.
OD
all of these

)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.