0.25 gm of a sample of common salt contains 0.1518gm of chlorine while 0.24 gm of another sample contained 0.1458 gm of chlorine. show that these data agree with the law of constant proportion.

The missing component to the table to the right or indicated with orange letters complete the table by filling in the corresponding numbers or symbols

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules

)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.