Viewed Questions
Draw a crystal field energy-level diagram, and predict the number of unpaired electrons for the following complexes: (a) $\left[\mathrm{NiCl}_{4}\right]^{2-}$ (tetrahedral) $\quad$ (b) $\left[\mathrm{Ni (\mathrm{CN})_{4}\right]^{2-}$ (square planar)
Questions asked
1. A small diameter tube closed at one end was filled with acetone to within 18 mm of the top and maintained at 290 K with a gentle stream of air blowing across the top. After 15000 sec, the liquid level was fallen to 27.5 mm, the vapour pressure of acetone was 21.95 kPa and atmospheric pressure was 99.75 kPa. Calculate the diffusivity of acetone in air. Given: the density of acetone is 790 kg/m3 and the molecular weight of acetone is 58 kg/kmol.
show the synthesis of 4-methyl acetophenone from benzene
David Collins
Numerade educator
Calculate the (H+) of a solution prepared by mixing 2ml of a strong acid solution of pH 3 and 3ml of a strong base of pH 10
Tianyu Li
calculate the pOH of 0.100M of Na3PO4
Oluwapelumi Kolawole
Isaac Huidobro
a solution containing 3.75mg per 100ml of A and the weight of A=210 has a transmittance of 39.6% in a 150cm cell at 480nm. Calculate the molar absorptivity of A and predict the substance and draw the structure.
highlight various phases of acid base titration curve
Angela Williamson
consider the titration of 40ml of 0.20M malonic acid with 0.100M NaOH. Calculate the pH at each point listed and sketch the titration curve when VB=0.00,8.0,12.5,19.3,25.0,37.5,50.0 and 56.3 ml
Ronald Prasad
diagram of titration curve of 0.01M HCl against 0.01M NaOH