In preparing solution number 1 (see experimental procedure), a student measures 5.0 mL of 2.00 x 10-3 M Fe(NO3)3, 2.0 mL of 2.00 x 10-3 M HSCN, and 3.0 mL of 0.50 M HNO3. (The solvent for the Fe(NO3)3 and HSCN solutions is 0.50 M HNO3). After combining these, what are the concentrations of Fe3 , HSCN, and H in the resulting solution

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

According to periodic trend, which of the following most likely has the highest ionization energy? kr be ni sc

)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.